Finding the Fourth Proportional to 16,663.50, 24,899.72 and 12,692.70

Step by Step Solution

1. Step 1: Write the proportion equation
   16,663.50 : 24,899.72 = 12,692.70 : x
2. Step 2: Convert to fraction form
   16,663.50/24,899.72 = 12,692.70/x
3. Step 3: Cross multiply
   16,663.50x = 24,899.72 × 12,692.70
4. Step 4: Simplify right side
   16,663.50x = 316,044,676.04
5. Step 5: Solve for x
   x = 316,044,676.04/16,663.50
6. Step 6: Final answer
   x = 18,966.28