Finding the Fourth Proportional to 78,013.39, 107,658.42 and 42,203.43

Step by Step Solution

1. Step 1: Write the proportion equation
   78,013.39 : 107,658.42 = 42,203.43 : x
2. Step 2: Convert to fraction form
   78,013.39/107,658.42 = 42,203.43/x
3. Step 3: Cross multiply
   78,013.39x = 107,658.42 × 42,203.43
4. Step 4: Simplify right side
   78,013.39x = 4,543,554,592.38
5. Step 5: Solve for x
   x = 4,543,554,592.38/78,013.39
6. Step 6: Final answer
   x = 58,240.70