Finding the Fourth Proportional to 12,672.15, 17,784.75 and 12,672.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,672.15 : 17,784.75 = 12,672.15 : x
2. Step 2: Convert to fraction form
   12,672.15/17,784.75 = 12,672.15/x
3. Step 3: Cross multiply
   12,672.15x = 17,784.75 × 12,672.15
4. Step 4: Simplify right side
   12,672.15x = 225,371,019.71
5. Step 5: Solve for x
   x = 225,371,019.71/12,672.15
6. Step 6: Final answer
   x = 17,784.75