Finding the Fourth Proportional to 12,705.17, 17,534.49 and 7,040.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.17 : 17,534.49 = 7,040.39 : x
2. Step 2: Convert to fraction form
   12,705.17/17,534.49 = 7,040.39/x
3. Step 3: Cross multiply
   12,705.17x = 17,534.49 × 7,040.39
4. Step 4: Simplify right side
   12,705.17x = 123,449,648.05
5. Step 5: Solve for x
   x = 123,449,648.05/12,705.17
6. Step 6: Final answer
   x = 9,716.49