Finding the Fourth Proportional to 12,839.92, 17,719.20 and 7,534.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.92 : 17,719.20 = 7,534.82 : x
2. Step 2: Convert to fraction form
   12,839.92/17,719.20 = 7,534.82/x
3. Step 3: Cross multiply
   12,839.92x = 17,719.20 × 7,534.82
4. Step 4: Simplify right side
   12,839.92x = 133,510,982.54
5. Step 5: Solve for x
   x = 133,510,982.54/12,839.92
6. Step 6: Final answer
   x = 10,398.12