Finding the Fourth Proportional to 16,642.50, 24,980.85 and 12,984.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,642.50 : 24,980.85 = 12,984.72 : x
2. Step 2: Convert to fraction form
   16,642.50/24,980.85 = 12,984.72/x
3. Step 3: Cross multiply
   16,642.50x = 24,980.85 × 12,984.72
4. Step 4: Simplify right side
   16,642.50x = 324,369,342.61
5. Step 5: Solve for x
   x = 324,369,342.61/16,642.50
6. Step 6: Final answer
   x = 19,490.42