Finding the Fourth Proportional to 12,860.52, 17,749.04 and 7,555.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,860.52 : 17,749.04 = 7,555.80 : x
2. Step 2: Convert to fraction form
   12,860.52/17,749.04 = 7,555.80/x
3. Step 3: Cross multiply
   12,860.52x = 17,749.04 × 7,555.80
4. Step 4: Simplify right side
   12,860.52x = 134,108,196.43
5. Step 5: Solve for x
   x = 134,108,196.43/12,860.52
6. Step 6: Final answer
   x = 10,427.90