Finding the Fourth Proportional to 12,637.59, 17,436.37 and 8,161.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,637.59 : 17,436.37 = 8,161.53 : x
2. Step 2: Convert to fraction form
   12,637.59/17,436.37 = 8,161.53/x
3. Step 3: Cross multiply
   12,637.59x = 17,436.37 × 8,161.53
4. Step 4: Simplify right side
   12,637.59x = 142,307,456.85
5. Step 5: Solve for x
   x = 142,307,456.85/12,637.59
6. Step 6: Final answer
   x = 11,260.65