Finding the Fourth Proportional to 21,668.78, 32,472.02 and 12,763.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,668.78 : 32,472.02 = 12,763.10 : x
2. Step 2: Convert to fraction form
   21,668.78/32,472.02 = 12,763.10/x
3. Step 3: Cross multiply
   21,668.78x = 32,472.02 × 12,763.10
4. Step 4: Simplify right side
   21,668.78x = 414,443,751.55
5. Step 5: Solve for x
   x = 414,443,751.55/21,668.78
6. Step 6: Final answer
   x = 19,126.31