Finding the Fourth Proportional to 78,499.80, 108,614.98 and 68,449.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,499.80 : 108,614.98 = 68,449.20 : x
2. Step 2: Convert to fraction form
   78,499.80/108,614.98 = 68,449.20/x
3. Step 3: Cross multiply
   78,499.80x = 108,614.98 × 68,449.20
4. Step 4: Simplify right side
   78,499.80x = 7,434,608,489.02
5. Step 5: Solve for x
   x = 7,434,608,489.02/78,499.80
6. Step 6: Final answer
   x = 94,708.63