Finding the Fourth Proportional to 78,141.49, 107,835.31 and 42,331.65

Step by Step Solution

1. Step 1: Write the proportion equation
   78,141.49 : 107,835.31 = 42,331.65 : x
2. Step 2: Convert to fraction form
   78,141.49/107,835.31 = 42,331.65/x
3. Step 3: Cross multiply
   78,141.49x = 107,835.31 × 42,331.65
4. Step 4: Simplify right side
   78,141.49x = 4,564,846,600.56
5. Step 5: Solve for x
   x = 4,564,846,600.56/78,141.49
6. Step 6: Final answer
   x = 58,417.71