Finding the Fourth Proportional to 2,487.87, 3,430.59 and 1,648.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,487.87 : 3,430.59 = 1,648.31 : x
2. Step 2: Convert to fraction form
   2,487.87/3,430.59 = 1,648.31/x
3. Step 3: Cross multiply
   2,487.87x = 3,430.59 × 1,648.31
4. Step 4: Simplify right side
   2,487.87x = 5,654,658.65
5. Step 5: Solve for x
   x = 5,654,658.65/2,487.87
6. Step 6: Final answer
   x = 2,272.89