Finding the Fourth Proportional to 31,723.62, 47,582.72 and 12,998.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,723.62 : 47,582.72 = 12,998.31 : x
2. Step 2: Convert to fraction form
   31,723.62/47,582.72 = 12,998.31/x
3. Step 3: Cross multiply
   31,723.62x = 47,582.72 × 12,998.31
4. Step 4: Simplify right side
   31,723.62x = 618,494,945.20
5. Step 5: Solve for x
   x = 618,494,945.20/31,723.62
6. Step 6: Final answer
   x = 19,496.35