Finding the Fourth Proportional to 22,673.64, 31,290.33 and 13,722.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,673.64 : 31,290.33 = 13,722.78 : x
2. Step 2: Convert to fraction form
   22,673.64/31,290.33 = 13,722.78/x
3. Step 3: Cross multiply
   22,673.64x = 31,290.33 × 13,722.78
4. Step 4: Simplify right side
   22,673.64x = 429,390,314.72
5. Step 5: Solve for x
   x = 429,390,314.72/22,673.64
6. Step 6: Final answer
   x = 18,937.86