Finding the Fourth Proportional to 78,141.70, 107,835.81 and 42,331.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,141.70 : 107,835.81 = 42,331.60 : x
2. Step 2: Convert to fraction form
   78,141.70/107,835.81 = 42,331.60/x
3. Step 3: Cross multiply
   78,141.70x = 107,835.81 × 42,331.60
4. Step 4: Simplify right side
   78,141.70x = 4,564,862,374.60
5. Step 5: Solve for x
   x = 4,564,862,374.60/78,141.70
6. Step 6: Final answer
   x = 58,417.75