Finding the Fourth Proportional to 9,113.17, 12,576.18 and 5,134.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,113.17 : 12,576.18 = 5,134.28 : x
2. Step 2: Convert to fraction form
   9,113.17/12,576.18 = 5,134.28/x
3. Step 3: Cross multiply
   9,113.17x = 12,576.18 × 5,134.28
4. Step 4: Simplify right side
   9,113.17x = 64,569,603.78
5. Step 5: Solve for x
   x = 64,569,603.78/9,113.17
6. Step 6: Final answer
   x = 7,085.31