Finding the Fourth Proportional to 78,147.32, 107,843.13 and 42,338.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,147.32 : 107,843.13 = 42,338.21 : x
2. Step 2: Convert to fraction form
   78,147.32/107,843.13 = 42,338.21/x
3. Step 3: Cross multiply
   78,147.32x = 107,843.13 × 42,338.21
4. Step 4: Simplify right side
   78,147.32x = 4,565,884,545.78
5. Step 5: Solve for x
   x = 4,565,884,545.78/78,147.32
6. Step 6: Final answer
   x = 58,426.63