Finding the Fourth Proportional to 12,510.36, 17,256.72 and 8,261.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,510.36 : 17,256.72 = 8,261.43 : x
2. Step 2: Convert to fraction form
   12,510.36/17,256.72 = 8,261.43/x
3. Step 3: Cross multiply
   12,510.36x = 17,256.72 × 8,261.43
4. Step 4: Simplify right side
   12,510.36x = 142,565,184.31
5. Step 5: Solve for x
   x = 142,565,184.31/12,510.36
6. Step 6: Final answer
   x = 11,395.77