Finding the Fourth Proportional to 7,659.92, 10,574.73 and 5,155.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,659.92 : 10,574.73 = 5,155.20 : x
2. Step 2: Convert to fraction form
   7,659.92/10,574.73 = 5,155.20/x
3. Step 3: Cross multiply
   7,659.92x = 10,574.73 × 5,155.20
4. Step 4: Simplify right side
   7,659.92x = 54,514,848.10
5. Step 5: Solve for x
   x = 54,514,848.10/7,659.92
6. Step 6: Final answer
   x = 7,116.89