Finding the Fourth Proportional to 90,467.86, 124,763.94 and 56,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,467.86 : 124,763.94 = 56,479.50 : x
2. Step 2: Convert to fraction form
   90,467.86/124,763.94 = 56,479.50/x
3. Step 3: Cross multiply
   90,467.86x = 124,763.94 × 56,479.50
4. Step 4: Simplify right side
   90,467.86x = 7,046,604,949.23
5. Step 5: Solve for x
   x = 7,046,604,949.23/90,467.86
6. Step 6: Final answer
   x = 77,890.70