Finding the Fourth Proportional to 22,993.98, 31,731 and 12,922.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,993.98 : 31,731 = 12,922.20 : x
2. Step 2: Convert to fraction form
   22,993.98/31,731 = 12,922.20/x
3. Step 3: Cross multiply
   22,993.98x = 31,731 × 12,922.20
4. Step 4: Simplify right side
   22,993.98x = 410,034,328.20
5. Step 5: Solve for x
   x = 410,034,328.20/22,993.98
6. Step 6: Final answer
   x = 17,832.25