Finding the Fourth Proportional to 8,919.84, 12,308.31 and 5,144.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,919.84 : 12,308.31 = 5,144.25 : x
2. Step 2: Convert to fraction form
   8,919.84/12,308.31 = 5,144.25/x
3. Step 3: Cross multiply
   8,919.84x = 12,308.31 × 5,144.25
4. Step 4: Simplify right side
   8,919.84x = 63,317,023.72
5. Step 5: Solve for x
   x = 63,317,023.72/8,919.84
6. Step 6: Final answer
   x = 7,098.45