Finding the Fourth Proportional to 16,518.90, 22,764.61 and 16,215.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,518.90 : 22,764.61 = 16,215.25 : x
2. Step 2: Convert to fraction form
   16,518.90/22,764.61 = 16,215.25/x
3. Step 3: Cross multiply
   16,518.90x = 22,764.61 × 16,215.25
4. Step 4: Simplify right side
   16,518.90x = 369,133,842.30
5. Step 5: Solve for x
   x = 369,133,842.30/16,518.90
6. Step 6: Final answer
   x = 22,346.15