Finding the Fourth Proportional to 2,648.07, 3,965.79 and 2,098.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.07 : 3,965.79 = 2,098.47 : x
2. Step 2: Convert to fraction form
   2,648.07/3,965.79 = 2,098.47/x
3. Step 3: Cross multiply
   2,648.07x = 3,965.79 × 2,098.47
4. Step 4: Simplify right side
   2,648.07x = 8,322,091.34
5. Step 5: Solve for x
   x = 8,322,091.34/2,648.07
6. Step 6: Final answer
   x = 3,142.70