Finding the Fourth Proportional to 78,519.85, 108,357.91 and 42,710.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,519.85 : 108,357.91 = 42,710.12 : x
2. Step 2: Convert to fraction form
   78,519.85/108,357.91 = 42,710.12/x
3. Step 3: Cross multiply
   78,519.85x = 108,357.91 × 42,710.12
4. Step 4: Simplify right side
   78,519.85x = 4,627,979,168.56
5. Step 5: Solve for x
   x = 4,627,979,168.56/78,519.85
6. Step 6: Final answer
   x = 58,940.24