Finding the Fourth Proportional to 3,990,852.72, 5,507,368.20 and 2,180,016.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,852.72 : 5,507,368.20 = 2,180,016.72 : x
2. Step 2: Convert to fraction form
   3,990,852.72/5,507,368.20 = 2,180,016.72/x
3. Step 3: Cross multiply
   3,990,852.72x = 5,507,368.20 × 2,180,016.72
4. Step 4: Simplify right side
   3,990,852.72x = 12,006,154,759,196.30
5. Step 5: Solve for x
   x = 12,006,154,759,196.30/3,990,852.72
6. Step 6: Final answer
   x = 3,008,418.40