Finding the Fourth Proportional to 78,158.90, 107,859.12 and 42,349.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,158.90 : 107,859.12 = 42,349.88 : x
2. Step 2: Convert to fraction form
   78,158.90/107,859.12 = 42,349.88/x
3. Step 3: Cross multiply
   78,158.90x = 107,859.12 × 42,349.88
4. Step 4: Simplify right side
   78,158.90x = 4,567,820,249.61
5. Step 5: Solve for x
   x = 4,567,820,249.61/78,158.90
6. Step 6: Final answer
   x = 58,442.74