Finding the Fourth Proportional to 22,681.18, 31,300.67 and 13,730.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,681.18 : 31,300.67 = 13,730.30 : x
2. Step 2: Convert to fraction form
   22,681.18/31,300.67 = 13,730.30/x
3. Step 3: Cross multiply
   22,681.18x = 31,300.67 × 13,730.30
4. Step 4: Simplify right side
   22,681.18x = 429,767,589.30
5. Step 5: Solve for x
   x = 429,767,589.30/22,681.18
6. Step 6: Final answer
   x = 18,948.20