Finding the Fourth Proportional to 12,448.88, 18,673.80 and 3,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.88 : 18,673.80 = 3,215.12 : x
2. Step 2: Convert to fraction form
   12,448.88/18,673.80 = 3,215.12/x
3. Step 3: Cross multiply
   12,448.88x = 18,673.80 × 3,215.12
4. Step 4: Simplify right side
   12,448.88x = 60,038,507.86
5. Step 5: Solve for x
   x = 60,038,507.86/12,448.88
6. Step 6: Final answer
   x = 4,822.80