Finding the Fourth Proportional to 8,920.74, 12,308.49 and 5,776.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.74 : 12,308.49 = 5,776.32 : x
2. Step 2: Convert to fraction form
   8,920.74/12,308.49 = 5,776.32/x
3. Step 3: Cross multiply
   8,920.74x = 12,308.49 × 5,776.32
4. Step 4: Simplify right side
   8,920.74x = 71,097,776.96
5. Step 5: Solve for x
   x = 71,097,776.96/8,920.74
6. Step 6: Final answer
   x = 7,969.94