Finding the Fourth Proportional to 21,158.89, 29,132.80 and 17,965.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,158.89 : 29,132.80 = 17,965.53 : x
2. Step 2: Convert to fraction form
   21,158.89/29,132.80 = 17,965.53/x
3. Step 3: Cross multiply
   21,158.89x = 29,132.80 × 17,965.53
4. Step 4: Simplify right side
   21,158.89x = 523,386,147.47
5. Step 5: Solve for x
   x = 523,386,147.47/21,158.89
6. Step 6: Final answer
   x = 24,736.00