Finding the Fourth Proportional to 30,720.50, 42,394.29 and 17,291.83

Step by Step Solution

1. Step 1: Write the proportion equation
   30,720.50 : 42,394.29 = 17,291.83 : x
2. Step 2: Convert to fraction form
   30,720.50/42,394.29 = 17,291.83/x
3. Step 3: Cross multiply
   30,720.50x = 42,394.29 × 17,291.83
4. Step 4: Simplify right side
   30,720.50x = 733,074,855.65
5. Step 5: Solve for x
   x = 733,074,855.65/30,720.50
6. Step 6: Final answer
   x = 23,862.73