Finding the Fourth Proportional to 22,086.52, 30,478.80 and 12,528.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,086.52 : 30,478.80 = 12,528.16 : x
2. Step 2: Convert to fraction form
   22,086.52/30,478.80 = 12,528.16/x
3. Step 3: Cross multiply
   22,086.52x = 30,478.80 × 12,528.16
4. Step 4: Simplify right side
   22,086.52x = 381,843,283.01
5. Step 5: Solve for x
   x = 381,843,283.01/22,086.52
6. Step 6: Final answer
   x = 17,288.52