Finding the Fourth Proportional to 2,620.72, 3,912.89 and 2,358.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.72 : 3,912.89 = 2,358.28 : x
2. Step 2: Convert to fraction form
   2,620.72/3,912.89 = 2,358.28/x
3. Step 3: Cross multiply
   2,620.72x = 3,912.89 × 2,358.28
4. Step 4: Simplify right side
   2,620.72x = 9,227,690.23
5. Step 5: Solve for x
   x = 9,227,690.23/2,620.72
6. Step 6: Final answer
   x = 3,521.05