Finding the Fourth Proportional to 78,315.48, 108,076.14 and 42,505.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,315.48 : 108,076.14 = 42,505.79 : x
2. Step 2: Convert to fraction form
   78,315.48/108,076.14 = 42,505.79/x
3. Step 3: Cross multiply
   78,315.48x = 108,076.14 × 42,505.79
4. Step 4: Simplify right side
   78,315.48x = 4,593,861,170.47
5. Step 5: Solve for x
   x = 4,593,861,170.47/78,315.48
6. Step 6: Final answer
   x = 58,658.41