Finding the Fourth Proportional to 12,636.59, 17,435.00 and 8,160.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,636.59 : 17,435.00 = 8,160.53 : x
2. Step 2: Convert to fraction form
   12,636.59/17,435.00 = 8,160.53/x
3. Step 3: Cross multiply
   12,636.59x = 17,435.00 × 8,160.53
4. Step 4: Simplify right side
   12,636.59x = 142,278,799.75
5. Step 5: Solve for x
   x = 142,278,799.75/12,636.59
6. Step 6: Final answer
   x = 11,259.27