Finding the Fourth Proportional to 16,128.86, 22,264.88 and 9,411.93

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.86 : 22,264.88 = 9,411.93 : x
2. Step 2: Convert to fraction form
   16,128.86/22,264.88 = 9,411.93/x
3. Step 3: Cross multiply
   16,128.86x = 22,264.88 × 9,411.93
4. Step 4: Simplify right side
   16,128.86x = 209,555,444.96
5. Step 5: Solve for x
   x = 209,555,444.96/16,128.86
6. Step 6: Final answer
   x = 12,992.58