Finding the Fourth Proportional to 31,369.55, 43,290.05 and 17,223.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,369.55 : 43,290.05 = 17,223.30 : x
2. Step 2: Convert to fraction form
   31,369.55/43,290.05 = 17,223.30/x
3. Step 3: Cross multiply
   31,369.55x = 43,290.05 × 17,223.30
4. Step 4: Simplify right side
   31,369.55x = 745,597,432.05
5. Step 5: Solve for x
   x = 745,597,432.05/31,369.55
6. Step 6: Final answer
   x = 23,768.19