Finding the Fourth Proportional to 78,088.14, 107,761.70 and 42,278.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,088.14 : 107,761.70 = 42,278.18 : x
2. Step 2: Convert to fraction form
   78,088.14/107,761.70 = 42,278.18/x
3. Step 3: Cross multiply
   78,088.14x = 107,761.70 × 42,278.18
4. Step 4: Simplify right side
   78,088.14x = 4,555,968,116.59
5. Step 5: Solve for x
   x = 4,555,968,116.59/78,088.14
6. Step 6: Final answer
   x = 58,343.92