Finding the Fourth Proportional to 12,372.72, 17,064.72 and 7,659.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,372.72 : 17,064.72 = 7,659.60 : x
2. Step 2: Convert to fraction form
   12,372.72/17,064.72 = 7,659.60/x
3. Step 3: Cross multiply
   12,372.72x = 17,064.72 × 7,659.60
4. Step 4: Simplify right side
   12,372.72x = 130,708,929.31
5. Step 5: Solve for x
   x = 130,708,929.31/12,372.72
6. Step 6: Final answer
   x = 10,564.28