Finding the Fourth Proportional to 8,919.72, 12,314.12 and 6,091.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,919.72 : 12,314.12 = 6,091.34 : x
2. Step 2: Convert to fraction form
   8,919.72/12,314.12 = 6,091.34/x
3. Step 3: Cross multiply
   8,919.72x = 12,314.12 × 6,091.34
4. Step 4: Simplify right side
   8,919.72x = 75,009,399.69
5. Step 5: Solve for x
   x = 75,009,399.69/8,919.72
6. Step 6: Final answer
   x = 8,409.39