Finding the Fourth Proportional to 8,648.40, 11,934.96 and 5,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.40 : 11,934.96 = 5,111.61 : x
2. Step 2: Convert to fraction form
   8,648.40/11,934.96 = 5,111.61/x
3. Step 3: Cross multiply
   8,648.40x = 11,934.96 × 5,111.61
4. Step 4: Simplify right side
   8,648.40x = 61,006,860.89
5. Step 5: Solve for x
   x = 61,006,860.89/8,648.40
6. Step 6: Final answer
   x = 7,054.12