Finding the Fourth Proportional to 21,401.64, 32,092.20 and 12,519.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.64 : 32,092.20 = 12,519.54 : x
2. Step 2: Convert to fraction form
   21,401.64/32,092.20 = 12,519.54/x
3. Step 3: Cross multiply
   21,401.64x = 32,092.20 × 12,519.54
4. Step 4: Simplify right side
   21,401.64x = 401,779,581.59
5. Step 5: Solve for x
   x = 401,779,581.59/21,401.64
6. Step 6: Final answer
   x = 18,773.31