Finding the Fourth Proportional to 16,365.06, 22,585.89 and 9,990.32

Step by Step Solution

1. Step 1: Write the proportion equation
   16,365.06 : 22,585.89 = 9,990.32 : x
2. Step 2: Convert to fraction form
   16,365.06/22,585.89 = 9,990.32/x
3. Step 3: Cross multiply
   16,365.06x = 22,585.89 × 9,990.32
4. Step 4: Simplify right side
   16,365.06x = 225,640,155.66
5. Step 5: Solve for x
   x = 225,640,155.66/16,365.06
6. Step 6: Final answer
   x = 13,787.92