Finding the Fourth Proportional to 22,816.32, 31,485.60 and 12,744.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,816.32 : 31,485.60 = 12,744.60 : x
2. Step 2: Convert to fraction form
   22,816.32/31,485.60 = 12,744.60/x
3. Step 3: Cross multiply
   22,816.32x = 31,485.60 × 12,744.60
4. Step 4: Simplify right side
   22,816.32x = 401,271,377.76
5. Step 5: Solve for x
   x = 401,271,377.76/22,816.32
6. Step 6: Final answer
   x = 17,587.03