Finding the Fourth Proportional to 28,386,578.05, 42,579,256.00 and 7,915,752.61

Step by Step Solution

1. Step 1: Write the proportion equation
   28,386,578.05 : 42,579,256.00 = 7,915,752.61 : x
2. Step 2: Convert to fraction form
   28,386,578.05/42,579,256.00 = 7,915,752.61/x
3. Step 3: Cross multiply
   28,386,578.05x = 42,579,256.00 × 7,915,752.61
4. Step 4: Simplify right side
   28,386,578.05x = 337,046,856,721,055.31
5. Step 5: Solve for x
   x = 337,046,856,721,055.31/28,386,578.05
6. Step 6: Final answer
   x = 11,873,458.51