Finding the Fourth Proportional to 9,120.28, 12,585.72 and 5,141.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.28 : 12,585.72 = 5,141.32 : x
2. Step 2: Convert to fraction form
   9,120.28/12,585.72 = 5,141.32/x
3. Step 3: Cross multiply
   9,120.28x = 12,585.72 × 5,141.32
4. Step 4: Simplify right side
   9,120.28x = 64,707,213.95
5. Step 5: Solve for x
   x = 64,707,213.95/9,120.28
6. Step 6: Final answer
   x = 7,094.87