Finding the Fourth Proportional to 9,107.27, 12,567.57 and 5,128.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,107.27 : 12,567.57 = 5,128.62 : x
2. Step 2: Convert to fraction form
   9,107.27/12,567.57 = 5,128.62/x
3. Step 3: Cross multiply
   9,107.27x = 12,567.57 × 5,128.62
4. Step 4: Simplify right side
   9,107.27x = 64,454,253.34
5. Step 5: Solve for x
   x = 64,454,253.34/9,107.27
6. Step 6: Final answer
   x = 7,077.23