Finding the Fourth Proportional to 22,818.20, 31,488.72 and 12,746

Step by Step Solution

1. Step 1: Write the proportion equation
   22,818.20 : 31,488.72 = 12,746 : x
2. Step 2: Convert to fraction form
   22,818.20/31,488.72 = 12,746/x
3. Step 3: Cross multiply
   22,818.20x = 31,488.72 × 12,746
4. Step 4: Simplify right side
   22,818.20x = 401,355,225.12
5. Step 5: Solve for x
   x = 401,355,225.12/22,818.20
6. Step 6: Final answer
   x = 17,589.26