Finding the Fourth Proportional to 21,585.33, 32,371.83 and 10,916.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,585.33 : 32,371.83 = 10,916.55 : x
2. Step 2: Convert to fraction form
   21,585.33/32,371.83 = 10,916.55/x
3. Step 3: Cross multiply
   21,585.33x = 32,371.83 × 10,916.55
4. Step 4: Simplify right side
   21,585.33x = 353,388,700.79
5. Step 5: Solve for x
   x = 353,388,700.79/21,585.33
6. Step 6: Final answer
   x = 16,371.71