Finding the Fourth Proportional to 8,109.72, 12,156.48 and 3,176.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.72 : 12,156.48 = 3,176.28 : x
2. Step 2: Convert to fraction form
   8,109.72/12,156.48 = 3,176.28/x
3. Step 3: Cross multiply
   8,109.72x = 12,156.48 × 3,176.28
4. Step 4: Simplify right side
   8,109.72x = 38,612,384.29
5. Step 5: Solve for x
   x = 38,612,384.29/8,109.72
6. Step 6: Final answer
   x = 4,761.25