Finding the Fourth Proportional to 5,112.76, 7,661.54 and 2,644.29

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112.76 : 7,661.54 = 2,644.29 : x
2. Step 2: Convert to fraction form
   5,112.76/7,661.54 = 2,644.29/x
3. Step 3: Cross multiply
   5,112.76x = 7,661.54 × 2,644.29
4. Step 4: Simplify right side
   5,112.76x = 20,259,333.61
5. Step 5: Solve for x
   x = 20,259,333.61/5,112.76
6. Step 6: Final answer
   x = 3,962.50