Finding the Fourth Proportional to 9,116.43, 12,580.43 and 5,137.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,116.43 : 12,580.43 = 5,137.31 : x
2. Step 2: Convert to fraction form
   9,116.43/12,580.43 = 5,137.31/x
3. Step 3: Cross multiply
   9,116.43x = 12,580.43 × 5,137.31
4. Step 4: Simplify right side
   9,116.43x = 64,629,480.25
5. Step 5: Solve for x
   x = 64,629,480.25/9,116.43
6. Step 6: Final answer
   x = 7,089.34