Finding the Fourth Proportional to 78,158.61, 107,858.61 and 42,349.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,158.61 : 107,858.61 = 42,349.50 : x
2. Step 2: Convert to fraction form
   78,158.61/107,858.61 = 42,349.50/x
3. Step 3: Cross multiply
   78,158.61x = 107,858.61 × 42,349.50
4. Step 4: Simplify right side
   78,158.61x = 4,567,758,204.20
5. Step 5: Solve for x
   x = 4,567,758,204.20/78,158.61
6. Step 6: Final answer
   x = 58,442.16