Finding the Fourth Proportional to 90,307.46, 124,684.56 and 56,329.58

Step by Step Solution

1. Step 1: Write the proportion equation
   90,307.46 : 124,684.56 = 56,329.58 : x
2. Step 2: Convert to fraction form
   90,307.46/124,684.56 = 56,329.58/x
3. Step 3: Cross multiply
   90,307.46x = 124,684.56 × 56,329.58
4. Step 4: Simplify right side
   90,307.46x = 7,023,428,897.28
5. Step 5: Solve for x
   x = 7,023,428,897.28/90,307.46
6. Step 6: Final answer
   x = 77,772.41