Finding the Fourth Proportional to 78,712.62, 108,620.22 and 42,901.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,712.62 : 108,620.22 = 42,901.86 : x
2. Step 2: Convert to fraction form
   78,712.62/108,620.22 = 42,901.86/x
3. Step 3: Cross multiply
   78,712.62x = 108,620.22 × 42,901.86
4. Step 4: Simplify right side
   78,712.62x = 4,660,009,471.61
5. Step 5: Solve for x
   x = 4,660,009,471.61/78,712.62
6. Step 6: Final answer
   x = 59,202.83