Finding the Fourth Proportional to 30,828.56, 42,543.24 and 17,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,828.56 : 42,543.24 = 17,399.12 : x
2. Step 2: Convert to fraction form
   30,828.56/42,543.24 = 17,399.12/x
3. Step 3: Cross multiply
   30,828.56x = 42,543.24 × 17,399.12
4. Step 4: Simplify right side
   30,828.56x = 740,214,937.95
5. Step 5: Solve for x
   x = 740,214,937.95/30,828.56
6. Step 6: Final answer
   x = 24,010.69