Finding the Fourth Proportional to 12,360.72, 17,048.16 and 7,647.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,360.72 : 17,048.16 = 7,647.60 : x
2. Step 2: Convert to fraction form
   12,360.72/17,048.16 = 7,647.60/x
3. Step 3: Cross multiply
   12,360.72x = 17,048.16 × 7,647.60
4. Step 4: Simplify right side
   12,360.72x = 130,377,508.42
5. Step 5: Solve for x
   x = 130,377,508.42/12,360.72
6. Step 6: Final answer
   x = 10,547.73