Finding the Fourth Proportional to 30,967.50, 42,727.82 and 18,221.24

Step by Step Solution

1. Step 1: Write the proportion equation
   30,967.50 : 42,727.82 = 18,221.24 : x
2. Step 2: Convert to fraction form
   30,967.50/42,727.82 = 18,221.24/x
3. Step 3: Cross multiply
   30,967.50x = 42,727.82 × 18,221.24
4. Step 4: Simplify right side
   30,967.50x = 778,553,862.90
5. Step 5: Solve for x
   x = 778,553,862.90/30,967.50
6. Step 6: Final answer
   x = 25,141.00