Finding the Fourth Proportional to 21,957.89, 32,938.51 and 10,861.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,957.89 : 32,938.51 = 10,861.60 : x
2. Step 2: Convert to fraction form
   21,957.89/32,938.51 = 10,861.60/x
3. Step 3: Cross multiply
   21,957.89x = 32,938.51 × 10,861.60
4. Step 4: Simplify right side
   21,957.89x = 357,764,920.22
5. Step 5: Solve for x
   x = 357,764,920.22/21,957.89
6. Step 6: Final answer
   x = 16,293.23