Finding the Fourth Proportional to 13,256.40, 18,284.31 and 8,536.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256.40 : 18,284.31 = 8,536.17 : x
2. Step 2: Convert to fraction form
   13,256.40/18,284.31 = 8,536.17/x
3. Step 3: Cross multiply
   13,256.40x = 18,284.31 × 8,536.17
4. Step 4: Simplify right side
   13,256.40x = 156,077,978.49
5. Step 5: Solve for x
   x = 156,077,978.49/13,256.40
6. Step 6: Final answer
   x = 11,773.78