Finding the Fourth Proportional to 16,390.53, 22,618.71 and 9,316.49

Step by Step Solution

1. Step 1: Write the proportion equation
   16,390.53 : 22,618.71 = 9,316.49 : x
2. Step 2: Convert to fraction form
   16,390.53/22,618.71 = 9,316.49/x
3. Step 3: Cross multiply
   16,390.53x = 22,618.71 × 9,316.49
4. Step 4: Simplify right side
   16,390.53x = 210,726,872.43
5. Step 5: Solve for x
   x = 210,726,872.43/16,390.53
6. Step 6: Final answer
   x = 12,856.62