Finding the Fourth Proportional to 78,342.24, 108,109.30 and 42,531.48

Step by Step Solution

1. Step 1: Write the proportion equation
   78,342.24 : 108,109.30 = 42,531.48 : x
2. Step 2: Convert to fraction form
   78,342.24/108,109.30 = 42,531.48/x
3. Step 3: Cross multiply
   78,342.24x = 108,109.30 × 42,531.48
4. Step 4: Simplify right side
   78,342.24x = 4,598,048,530.76
5. Step 5: Solve for x
   x = 4,598,048,530.76/78,342.24
6. Step 6: Final answer
   x = 58,691.82