Finding the Fourth Proportional to 20,624.43, 28,459.98 and 12,126.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,624.43 : 28,459.98 = 12,126.83 : x
2. Step 2: Convert to fraction form
   20,624.43/28,459.98 = 12,126.83/x
3. Step 3: Cross multiply
   20,624.43x = 28,459.98 × 12,126.83
4. Step 4: Simplify right side
   20,624.43x = 345,129,196.96
5. Step 5: Solve for x
   x = 345,129,196.96/20,624.43
6. Step 6: Final answer
   x = 16,734.00