Finding the Fourth Proportional to 12,732.22, 18,967.05 and 12,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,732.22 : 18,967.05 = 12,345.31 : x
2. Step 2: Convert to fraction form
   12,732.22/18,967.05 = 12,345.31/x
3. Step 3: Cross multiply
   12,732.22x = 18,967.05 × 12,345.31
4. Step 4: Simplify right side
   12,732.22x = 234,154,112.04
5. Step 5: Solve for x
   x = 234,154,112.04/12,732.22
6. Step 6: Final answer
   x = 18,390.67