Finding the Fourth Proportional to 78,147.29, 107,843.13 and 42,338.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,147.29 : 107,843.13 = 42,338.21 : x
2. Step 2: Convert to fraction form
   78,147.29/107,843.13 = 42,338.21/x
3. Step 3: Cross multiply
   78,147.29x = 107,843.13 × 42,338.21
4. Step 4: Simplify right side
   78,147.29x = 4,565,885,085.00
5. Step 5: Solve for x
   x = 4,565,885,085.00/78,147.29
6. Step 6: Final answer
   x = 58,426.66