Finding the Fourth Proportional to 90,566.78, 124,956.87 and 56,609.83

Step by Step Solution

1. Step 1: Write the proportion equation
   90,566.78 : 124,956.87 = 56,609.83 : x
2. Step 2: Convert to fraction form
   90,566.78/124,956.87 = 56,609.83/x
3. Step 3: Cross multiply
   90,566.78x = 124,956.87 × 56,609.83
4. Step 4: Simplify right side
   90,566.78x = 7,073,787,168.03
5. Step 5: Solve for x
   x = 7,073,787,168.03/90,566.78
6. Step 6: Final answer
   x = 78,105.76