Finding the Fourth Proportional to 21,573, 32,312.76 and 10,456.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,573 : 32,312.76 = 10,456.43 : x
2. Step 2: Convert to fraction form
   21,573/32,312.76 = 10,456.43/x
3. Step 3: Cross multiply
   21,573x = 32,312.76 × 10,456.43
4. Step 4: Simplify right side
   21,573x = 337,876,193.83
5. Step 5: Solve for x
   x = 337,876,193.83/21,573
6. Step 6: Final answer
   x = 15,661.99