Finding the Fourth Proportional to 89,357.18, 133,831.61 and 42,642.86

Step by Step Solution

1. Step 1: Write the proportion equation
   89,357.18 : 133,831.61 = 42,642.86 : x
2. Step 2: Convert to fraction form
   89,357.18/133,831.61 = 42,642.86/x
3. Step 3: Cross multiply
   89,357.18x = 133,831.61 × 42,642.86
4. Step 4: Simplify right side
   89,357.18x = 5,706,962,608.80
5. Step 5: Solve for x
   x = 5,706,962,608.80/89,357.18
6. Step 6: Final answer
   x = 63,866.86