Finding the Fourth Proportional to 12,439.42, 17,165.53 and 7,061.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.42 : 17,165.53 = 7,061.97 : x
2. Step 2: Convert to fraction form
   12,439.42/17,165.53 = 7,061.97/x
3. Step 3: Cross multiply
   12,439.42x = 17,165.53 × 7,061.97
4. Step 4: Simplify right side
   12,439.42x = 121,222,457.89
5. Step 5: Solve for x
   x = 121,222,457.89/12,439.42
6. Step 6: Final answer
   x = 9,745.02