Finding the Fourth Proportional to 8,648.42, 11,932.90 and 5,109.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.42 : 11,932.90 = 5,109.80 : x
2. Step 2: Convert to fraction form
   8,648.42/11,932.90 = 5,109.80/x
3. Step 3: Cross multiply
   8,648.42x = 11,932.90 × 5,109.80
4. Step 4: Simplify right side
   8,648.42x = 60,974,732.42
5. Step 5: Solve for x
   x = 60,974,732.42/8,648.42
6. Step 6: Final answer
   x = 7,050.39