Finding the Fourth Proportional to 22,268.04, 30,728.56 and 12,706.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,268.04 : 30,728.56 = 12,706.60 : x
2. Step 2: Convert to fraction form
   22,268.04/30,728.56 = 12,706.60/x
3. Step 3: Cross multiply
   22,268.04x = 30,728.56 × 12,706.60
4. Step 4: Simplify right side
   22,268.04x = 390,455,520.50
5. Step 5: Solve for x
   x = 390,455,520.50/22,268.04
6. Step 6: Final answer
   x = 17,534.35