Finding the Fourth Proportional to 2,628.22, 3,939.18 and 1,165.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.22 : 3,939.18 = 1,165.72 : x
2. Step 2: Convert to fraction form
   2,628.22/3,939.18 = 1,165.72/x
3. Step 3: Cross multiply
   2,628.22x = 3,939.18 × 1,165.72
4. Step 4: Simplify right side
   2,628.22x = 4,591,980.91
5. Step 5: Solve for x
   x = 4,591,980.91/2,628.22
6. Step 6: Final answer
   x = 1,747.18