Finding the Fourth Proportional to 78,088.27, 107,761.88 and 42,278.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,088.27 : 107,761.88 = 42,278.30 : x
2. Step 2: Convert to fraction form
   78,088.27/107,761.88 = 42,278.30/x
3. Step 3: Cross multiply
   78,088.27x = 107,761.88 × 42,278.30
4. Step 4: Simplify right side
   78,088.27x = 4,555,989,091.20
5. Step 5: Solve for x
   x = 4,555,989,091.20/78,088.27
6. Step 6: Final answer
   x = 58,344.09