Finding the Fourth Proportional to 22,488.23, 31,004.88 and 18,440.21

Step by Step Solution

1. Step 1: Write the proportion equation
   22,488.23 : 31,004.88 = 18,440.21 : x
2. Step 2: Convert to fraction form
   22,488.23/31,004.88 = 18,440.21/x
3. Step 3: Cross multiply
   22,488.23x = 31,004.88 × 18,440.21
4. Step 4: Simplify right side
   22,488.23x = 571,736,498.22
5. Step 5: Solve for x
   x = 571,736,498.22/22,488.23
6. Step 6: Final answer
   x = 25,423.81