Finding the Fourth Proportional to 31,672.98, 47,491.83 and 12,966.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,672.98 : 47,491.83 = 12,966.12 : x
2. Step 2: Convert to fraction form
   31,672.98/47,491.83 = 12,966.12/x
3. Step 3: Cross multiply
   31,672.98x = 47,491.83 × 12,966.12
4. Step 4: Simplify right side
   31,672.98x = 615,784,766.80
5. Step 5: Solve for x
   x = 615,784,766.80/31,672.98
6. Step 6: Final answer
   x = 19,441.96