Finding the Fourth Proportional to 21,665.50, 32,494.14 and 10,561.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.50 : 32,494.14 = 10,561.02 : x
2. Step 2: Convert to fraction form
   21,665.50/32,494.14 = 10,561.02/x
3. Step 3: Cross multiply
   21,665.50x = 32,494.14 × 10,561.02
4. Step 4: Simplify right side
   21,665.50x = 343,171,262.42
5. Step 5: Solve for x
   x = 343,171,262.42/21,665.50
6. Step 6: Final answer
   x = 15,839.53