Finding the Fourth Proportional to 90,200.32, 124,481.28 and 56,677.12

Step by Step Solution

1. Step 1: Write the proportion equation
   90,200.32 : 124,481.28 = 56,677.12 : x
2. Step 2: Convert to fraction form
   90,200.32/124,481.28 = 56,677.12/x
3. Step 3: Cross multiply
   90,200.32x = 124,481.28 × 56,677.12
4. Step 4: Simplify right side
   90,200.32x = 7,055,240,444.31
5. Step 5: Solve for x
   x = 7,055,240,444.31/90,200.32
6. Step 6: Final answer
   x = 78,217.47