Finding the Fourth Proportional to 8,076.65, 12,120.51 and 3,146.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,076.65 : 12,120.51 = 3,146.31 : x
2. Step 2: Convert to fraction form
   8,076.65/12,120.51 = 3,146.31/x
3. Step 3: Cross multiply
   8,076.65x = 12,120.51 × 3,146.31
4. Step 4: Simplify right side
   8,076.65x = 38,134,881.82
5. Step 5: Solve for x
   x = 38,134,881.82/8,076.65
6. Step 6: Final answer
   x = 4,721.62