Finding the Fourth Proportional to 12,145.76, 16,746.82 and 8,319.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.76 : 16,746.82 = 8,319.25 : x
2. Step 2: Convert to fraction form
   12,145.76/16,746.82 = 8,319.25/x
3. Step 3: Cross multiply
   12,145.76x = 16,746.82 × 8,319.25
4. Step 4: Simplify right side
   12,145.76x = 139,320,919.62
5. Step 5: Solve for x
   x = 139,320,919.62/12,145.76
6. Step 6: Final answer
   x = 11,470.75