Finding the Fourth Proportional to 78,146.29, 107,841.75 and 42,337.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,146.29 : 107,841.75 = 42,337.21 : x
2. Step 2: Convert to fraction form
   78,146.29/107,841.75 = 42,337.21/x
3. Step 3: Cross multiply
   78,146.29x = 107,841.75 × 42,337.21
4. Step 4: Simplify right side
   78,146.29x = 4,565,718,816.52
5. Step 5: Solve for x
   x = 4,565,718,816.52/78,146.29
6. Step 6: Final answer
   x = 58,425.28