Finding the Fourth Proportional to 78,687.47, 108,588.76 and 42,877.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,687.47 : 108,588.76 = 42,877.47 : x
2. Step 2: Convert to fraction form
   78,687.47/108,588.76 = 42,877.47/x
3. Step 3: Cross multiply
   78,687.47x = 108,588.76 × 42,877.47
4. Step 4: Simplify right side
   78,687.47x = 4,656,011,192.04
5. Step 5: Solve for x
   x = 4,656,011,192.04/78,687.47
6. Step 6: Final answer
   x = 59,170.93