Finding the Fourth Proportional to 22,242.98, 30,706.42 and 12,809.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,242.98 : 30,706.42 = 12,809.72 : x
2. Step 2: Convert to fraction form
   22,242.98/30,706.42 = 12,809.72/x
3. Step 3: Cross multiply
   22,242.98x = 30,706.42 × 12,809.72
4. Step 4: Simplify right side
   22,242.98x = 393,340,642.40
5. Step 5: Solve for x
   x = 393,340,642.40/22,242.98
6. Step 6: Final answer
   x = 17,683.81