Finding the Fourth Proportional to 12,287.68, 18,432.72 and 12,097.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,287.68 : 18,432.72 = 12,097.12 : x
2. Step 2: Convert to fraction form
   12,287.68/18,432.72 = 12,097.12/x
3. Step 3: Cross multiply
   12,287.68x = 18,432.72 × 12,097.12
4. Step 4: Simplify right side
   12,287.68x = 222,982,825.77
5. Step 5: Solve for x
   x = 222,982,825.77/12,287.68
6. Step 6: Final answer
   x = 18,146.86