Finding the Fourth Proportional to 78,127.38, 107,815.82 and 42,317.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,127.38 : 107,815.82 = 42,317.28 : x
2. Step 2: Convert to fraction form
   78,127.38/107,815.82 = 42,317.28/x
3. Step 3: Cross multiply
   78,127.38x = 107,815.82 × 42,317.28
4. Step 4: Simplify right side
   78,127.38x = 4,562,472,031.78
5. Step 5: Solve for x
   x = 4,562,472,031.78/78,127.38
6. Step 6: Final answer
   x = 58,397.86