Finding the Fourth Proportional to 90,661.73, 125,061.05 and 56,611.10

Step by Step Solution

1. Step 1: Write the proportion equation
   90,661.73 : 125,061.05 = 56,611.10 : x
2. Step 2: Convert to fraction form
   90,661.73/125,061.05 = 56,611.10/x
3. Step 3: Cross multiply
   90,661.73x = 125,061.05 × 56,611.10
4. Step 4: Simplify right side
   90,661.73x = 7,079,842,982.35
5. Step 5: Solve for x
   x = 7,079,842,982.35/90,661.73
6. Step 6: Final answer
   x = 78,090.76