Finding the Fourth Proportional to 90,141.76, 124,393.74 and 56,133.10

Step by Step Solution

1. Step 1: Write the proportion equation
   90,141.76 : 124,393.74 = 56,133.10 : x
2. Step 2: Convert to fraction form
   90,141.76/124,393.74 = 56,133.10/x
3. Step 3: Cross multiply
   90,141.76x = 124,393.74 × 56,133.10
4. Step 4: Simplify right side
   90,141.76x = 6,982,605,624.83
5. Step 5: Solve for x
   x = 6,982,605,624.83/90,141.76
6. Step 6: Final answer
   x = 77,462.50