Finding the Fourth Proportional to 9,417.88, 12,997.30 and 5,439.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,417.88 : 12,997.30 = 5,439.16 : x
2. Step 2: Convert to fraction form
   9,417.88/12,997.30 = 5,439.16/x
3. Step 3: Cross multiply
   9,417.88x = 12,997.30 × 5,439.16
4. Step 4: Simplify right side
   9,417.88x = 70,694,394.27
5. Step 5: Solve for x
   x = 70,694,394.27/9,417.88
6. Step 6: Final answer
   x = 7,506.40