Finding the Fourth Proportional to 16,128.11, 22,263.84 and 9,411.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.11 : 22,263.84 = 9,411.18 : x
2. Step 2: Convert to fraction form
   16,128.11/22,263.84 = 9,411.18/x
3. Step 3: Cross multiply
   16,128.11x = 22,263.84 × 9,411.18
4. Step 4: Simplify right side
   16,128.11x = 209,529,005.73
5. Step 5: Solve for x
   x = 209,529,005.73/16,128.11
6. Step 6: Final answer
   x = 12,991.55