Finding the Fourth Proportional to 11,536.32, 17,241.27 and 8,422.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,536.32 : 17,241.27 = 8,422.89 : x
2. Step 2: Convert to fraction form
   11,536.32/17,241.27 = 8,422.89/x
3. Step 3: Cross multiply
   11,536.32x = 17,241.27 × 8,422.89
4. Step 4: Simplify right side
   11,536.32x = 145,221,320.67
5. Step 5: Solve for x
   x = 145,221,320.67/11,536.32
6. Step 6: Final answer
   x = 12,588.18