Finding the Fourth Proportional to 13,467,620,877.51, 20,201,450,758.89 and 5,499,789,113.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,467,620,877.51 : 20,201,450,758.89 = 5,499,789,113.21 : x
2. Step 2: Convert to fraction form
   13,467,620,877.51/20,201,450,758.89 = 5,499,789,113.21/x
3. Step 3: Cross multiply
   13,467,620,877.51x = 20,201,450,758.89 × 5,499,789,113.21
4. Step 4: Simplify right side
   13,467,620,877.51x = 111,103,718,954,690,101,248
5. Step 5: Solve for x
   x = 111,103,718,954,690,101,248/13,467,620,877.51
6. Step 6: Final answer
   x = 8,249,691,609.62