Finding the Fourth Proportional to 90,469.86, 124,766.70 and 56,481.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,469.86 : 124,766.70 = 56,481.50 : x
2. Step 2: Convert to fraction form
   90,469.86/124,766.70 = 56,481.50/x
3. Step 3: Cross multiply
   90,469.86x = 124,766.70 × 56,481.50
4. Step 4: Simplify right side
   90,469.86x = 7,047,010,366.05
5. Step 5: Solve for x
   x = 7,047,010,366.05/90,469.86
6. Step 6: Final answer
   x = 77,893.46