Finding the Fourth Proportional to 30,615.89, 42,249.91 and 17,187.17

Step by Step Solution

1. Step 1: Write the proportion equation
   30,615.89 : 42,249.91 = 17,187.17 : x
2. Step 2: Convert to fraction form
   30,615.89/42,249.91 = 17,187.17/x
3. Step 3: Cross multiply
   30,615.89x = 42,249.91 × 17,187.17
4. Step 4: Simplify right side
   30,615.89x = 726,156,385.65
5. Step 5: Solve for x
   x = 726,156,385.65/30,615.89
6. Step 6: Final answer
   x = 23,718.28