Finding the Fourth Proportional to 9,128.16, 12,596.94 and 5,351.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.16 : 12,596.94 = 5,351.40 : x
2. Step 2: Convert to fraction form
   9,128.16/12,596.94 = 5,351.40/x
3. Step 3: Cross multiply
   9,128.16x = 12,596.94 × 5,351.40
4. Step 4: Simplify right side
   9,128.16x = 67,411,264.72
5. Step 5: Solve for x
   x = 67,411,264.72/9,128.16
6. Step 6: Final answer
   x = 7,384.98