Finding the Fourth Proportional to 90,473.91, 124,801.76 and 56,423.30

Step by Step Solution

1. Step 1: Write the proportion equation
   90,473.91 : 124,801.76 = 56,423.30 : x
2. Step 2: Convert to fraction form
   90,473.91/124,801.76 = 56,423.30/x
3. Step 3: Cross multiply
   90,473.91x = 124,801.76 × 56,423.30
4. Step 4: Simplify right side
   90,473.91x = 7,041,726,238.88
5. Step 5: Solve for x
   x = 7,041,726,238.88/90,473.91
6. Step 6: Final answer
   x = 77,831.57