Finding the Fourth Proportional to 90,665.74, 125,035 and 56,663.36

Step by Step Solution

1. Step 1: Write the proportion equation
   90,665.74 : 125,035 = 56,663.36 : x
2. Step 2: Convert to fraction form
   90,665.74/125,035 = 56,663.36/x
3. Step 3: Cross multiply
   90,665.74x = 125,035 × 56,663.36
4. Step 4: Simplify right side
   90,665.74x = 7,084,903,217.60
5. Step 5: Solve for x
   x = 7,084,903,217.60/90,665.74
6. Step 6: Final answer
   x = 78,143.11