Finding the Fourth Proportional to 16,191.30, 22,343.56 and 9,117.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,191.30 : 22,343.56 = 9,117.57 : x
2. Step 2: Convert to fraction form
   16,191.30/22,343.56 = 9,117.57/x
3. Step 3: Cross multiply
   16,191.30x = 22,343.56 × 9,117.57
4. Step 4: Simplify right side
   16,191.30x = 203,718,949.56
5. Step 5: Solve for x
   x = 203,718,949.56/16,191.30
6. Step 6: Final answer
   x = 12,582.00