Finding the Fourth Proportional to 22,380.70, 30,882.94 and 12,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.70 : 30,882.94 = 12,947.50 : x
2. Step 2: Convert to fraction form
   22,380.70/30,882.94 = 12,947.50/x
3. Step 3: Cross multiply
   22,380.70x = 30,882.94 × 12,947.50
4. Step 4: Simplify right side
   22,380.70x = 399,856,865.65
5. Step 5: Solve for x
   x = 399,856,865.65/22,380.70
6. Step 6: Final answer
   x = 17,866.15