Finding the Fourth Proportional to 31,651.32, 47,493.18 and 12,945.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,651.32 : 47,493.18 = 12,945.18 : x
2. Step 2: Convert to fraction form
   31,651.32/47,493.18 = 12,945.18/x
3. Step 3: Cross multiply
   31,651.32x = 47,493.18 × 12,945.18
4. Step 4: Simplify right side
   31,651.32x = 614,807,763.87
5. Step 5: Solve for x
   x = 614,807,763.87/31,651.32
6. Step 6: Final answer
   x = 19,424.40