Finding the Fourth Proportional to 78,687.33, 108,588.48 and 42,877.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,687.33 : 108,588.48 = 42,877.31 : x
2. Step 2: Convert to fraction form
   78,687.33/108,588.48 = 42,877.31/x
3. Step 3: Cross multiply
   78,687.33x = 108,588.48 × 42,877.31
4. Step 4: Simplify right side
   78,687.33x = 4,655,981,376.45
5. Step 5: Solve for x
   x = 4,655,981,376.45/78,687.33
6. Step 6: Final answer
   x = 59,170.66