Finding the Fourth Proportional to 2,629.68, 3,625.59 and 2,155.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.68 : 3,625.59 = 2,155.86 : x
2. Step 2: Convert to fraction form
   2,629.68/3,625.59 = 2,155.86/x
3. Step 3: Cross multiply
   2,629.68x = 3,625.59 × 2,155.86
4. Step 4: Simplify right side
   2,629.68x = 7,816,264.46
5. Step 5: Solve for x
   x = 7,816,264.46/2,629.68
6. Step 6: Final answer
   x = 2,972.33