Finding the Fourth Proportional to 78,686.55, 108,587.28 and 42,876.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,686.55 : 108,587.28 = 42,876.82 : x
2. Step 2: Convert to fraction form
   78,686.55/108,587.28 = 42,876.82/x
3. Step 3: Cross multiply
   78,686.55x = 108,587.28 × 42,876.82
4. Step 4: Simplify right side
   78,686.55x = 4,655,877,249.97
5. Step 5: Solve for x
   x = 4,655,877,249.97/78,686.55
6. Step 6: Final answer
   x = 59,169.92