Finding the Fourth Proportional to 78,170.74, 107,875.20 and 42,359.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,170.74 : 107,875.20 = 42,359.83 : x
2. Step 2: Convert to fraction form
   78,170.74/107,875.20 = 42,359.83/x
3. Step 3: Cross multiply
   78,170.74x = 107,875.20 × 42,359.83
4. Step 4: Simplify right side
   78,170.74x = 4,569,575,133.22
5. Step 5: Solve for x
   x = 4,569,575,133.22/78,170.74
6. Step 6: Final answer
   x = 58,456.34