Finding the Fourth Proportional to 16,361.72, 22,580.34 and 9,288.61

Step by Step Solution

1. Step 1: Write the proportion equation
   16,361.72 : 22,580.34 = 9,288.61 : x
2. Step 2: Convert to fraction form
   16,361.72/22,580.34 = 9,288.61/x
3. Step 3: Cross multiply
   16,361.72x = 22,580.34 × 9,288.61
4. Step 4: Simplify right side
   16,361.72x = 209,739,971.93
5. Step 5: Solve for x
   x = 209,739,971.93/16,361.72
6. Step 6: Final answer
   x = 12,818.94