Finding the Fourth Proportional to 31,414.50, 47,143.35 and 12,946.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,414.50 : 47,143.35 = 12,946.50 : x
2. Step 2: Convert to fraction form
   31,414.50/47,143.35 = 12,946.50/x
3. Step 3: Cross multiply
   31,414.50x = 47,143.35 × 12,946.50
4. Step 4: Simplify right side
   31,414.50x = 610,341,380.78
5. Step 5: Solve for x
   x = 610,341,380.78/31,414.50
6. Step 6: Final answer
   x = 19,428.65