Finding the Fourth Proportional to 16,388.50, 22,618.06 and 9,315.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,388.50 : 22,618.06 = 9,315.98 : x
2. Step 2: Convert to fraction form
   16,388.50/22,618.06 = 9,315.98/x
3. Step 3: Cross multiply
   16,388.50x = 22,618.06 × 9,315.98
4. Step 4: Simplify right side
   16,388.50x = 210,709,394.60
5. Step 5: Solve for x
   x = 210,709,394.60/16,388.50
6. Step 6: Final answer
   x = 12,857.15