Finding the Fourth Proportional to 78,493.80, 108,606.69 and 68,443.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,493.80 : 108,606.69 = 68,443.20 : x
2. Step 2: Convert to fraction form
   78,493.80/108,606.69 = 68,443.20/x
3. Step 3: Cross multiply
   78,493.80x = 108,606.69 × 68,443.20
4. Step 4: Simplify right side
   78,493.80x = 7,433,389,405.01
5. Step 5: Solve for x
   x = 7,433,389,405.01/78,493.80
6. Step 6: Final answer
   x = 94,700.34