Finding the Fourth Proportional to 21,630.30, 32,463.68 and 8,491.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,630.30 : 32,463.68 = 8,491.89 : x
2. Step 2: Convert to fraction form
   21,630.30/32,463.68 = 8,491.89/x
3. Step 3: Cross multiply
   21,630.30x = 32,463.68 × 8,491.89
4. Step 4: Simplify right side
   21,630.30x = 275,677,999.56
5. Step 5: Solve for x
   x = 275,677,999.56/21,630.30
6. Step 6: Final answer
   x = 12,744.99