Finding the Fourth Proportional to 2,645.07, 3,648.51 and 2,085.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.07 : 3,648.51 = 2,085.36 : x
2. Step 2: Convert to fraction form
   2,645.07/3,648.51 = 2,085.36/x
3. Step 3: Cross multiply
   2,645.07x = 3,648.51 × 2,085.36
4. Step 4: Simplify right side
   2,645.07x = 7,608,456.81
5. Step 5: Solve for x
   x = 7,608,456.81/2,645.07
6. Step 6: Final answer
   x = 2,876.47