Finding the Fourth Proportional to 825,540,982.82, 1,139,212,172.72 and 449,199,048.50

Step by Step Solution

1. Step 1: Write the proportion equation
   825,540,982.82 : 1,139,212,172.72 = 449,199,048.50 : x
2. Step 2: Convert to fraction form
   825,540,982.82/1,139,212,172.72 = 449,199,048.50/x
3. Step 3: Cross multiply
   825,540,982.82x = 1,139,212,172.72 × 449,199,048.50
4. Step 4: Simplify right side
   825,540,982.82x = 511,733,024,023,195,648
5. Step 5: Solve for x
   x = 511,733,024,023,195,648/825,540,982.82
6. Step 6: Final answer
   x = 619,875,977.90