Finding the Fourth Proportional to 12,648.33, 18,961.79 and 5,248.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.33 : 18,961.79 = 5,248.17 : x
2. Step 2: Convert to fraction form
   12,648.33/18,961.79 = 5,248.17/x
3. Step 3: Cross multiply
   12,648.33x = 18,961.79 × 5,248.17
4. Step 4: Simplify right side
   12,648.33x = 99,514,671.18
5. Step 5: Solve for x
   x = 99,514,671.18/12,648.33
6. Step 6: Final answer
   x = 7,867.81