Finding the Fourth Proportional to 12,426.72, 18,640.08 and 3,192

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.72 : 18,640.08 = 3,192 : x
2. Step 2: Convert to fraction form
   12,426.72/18,640.08 = 3,192/x
3. Step 3: Cross multiply
   12,426.72x = 18,640.08 × 3,192
4. Step 4: Simplify right side
   12,426.72x = 59,499,135.36
5. Step 5: Solve for x
   x = 59,499,135.36/12,426.72
6. Step 6: Final answer
   x = 4,788.00