Finding the Fourth Proportional to 12,868.35, 17,760.38 and 7,564.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.35 : 17,760.38 = 7,564.47 : x
2. Step 2: Convert to fraction form
   12,868.35/17,760.38 = 7,564.47/x
3. Step 3: Cross multiply
   12,868.35x = 17,760.38 × 7,564.47
4. Step 4: Simplify right side
   12,868.35x = 134,347,823.88
5. Step 5: Solve for x
   x = 134,347,823.88/12,868.35
6. Step 6: Final answer
   x = 10,440.17