Finding the Fourth Proportional to 21,569,443.92, 29,766,567.12 and 12,756,449.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,569,443.92 : 29,766,567.12 = 12,756,449.88 : x
2. Step 2: Convert to fraction form
   21,569,443.92/29,766,567.12 = 12,756,449.88/x
3. Step 3: Cross multiply
   21,569,443.92x = 29,766,567.12 × 12,756,449.88
4. Step 4: Simplify right side
   21,569,443.92x = 379,715,721,565,936
5. Step 5: Solve for x
   x = 379,715,721,565,936/21,569,443.92
6. Step 6: Final answer
   x = 17,604,335.23