Finding the Fourth Proportional to 22,160.65, 30,581.79 and 12,089.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,160.65 : 30,581.79 = 12,089.31 : x
2. Step 2: Convert to fraction form
   22,160.65/30,581.79 = 12,089.31/x
3. Step 3: Cross multiply
   22,160.65x = 30,581.79 × 12,089.31
4. Step 4: Simplify right side
   22,160.65x = 369,712,751.67
5. Step 5: Solve for x
   x = 369,712,751.67/22,160.65
6. Step 6: Final answer
   x = 16,683.30