Finding the Fourth Proportional to 103,300.40, 154,691.40 and 68,049.20

Step by Step Solution

1. Step 1: Write the proportion equation
   103,300.40 : 154,691.40 = 68,049.20 : x
2. Step 2: Convert to fraction form
   103,300.40/154,691.40 = 68,049.20/x
3. Step 3: Cross multiply
   103,300.40x = 154,691.40 × 68,049.20
4. Step 4: Simplify right side
   103,300.40x = 10,526,626,016.88
5. Step 5: Solve for x
   x = 10,526,626,016.88/103,300.40
6. Step 6: Final answer
   x = 101,903.05