Finding the Fourth Proportional to 2,907.89, 4,012.59 and 1,648.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,907.89 : 4,012.59 = 1,648.69 : x
2. Step 2: Convert to fraction form
   2,907.89/4,012.59 = 1,648.69/x
3. Step 3: Cross multiply
   2,907.89x = 4,012.59 × 1,648.69
4. Step 4: Simplify right side
   2,907.89x = 6,615,517.01
5. Step 5: Solve for x
   x = 6,615,517.01/2,907.89
6. Step 6: Final answer
   x = 2,275.02