Finding the Fourth Proportional to 5,098.42, 7,640.51 and 2,628.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,098.42 : 7,640.51 = 2,628.05 : x
2. Step 2: Convert to fraction form
   5,098.42/7,640.51 = 2,628.05/x
3. Step 3: Cross multiply
   5,098.42x = 7,640.51 × 2,628.05
4. Step 4: Simplify right side
   5,098.42x = 20,079,648.27
5. Step 5: Solve for x
   x = 20,079,648.27/5,098.42
6. Step 6: Final answer
   x = 3,938.41