Finding the Fourth Proportional to 2,640.09, 3,642.77 and 1,577.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.09 : 3,642.77 = 1,577.58 : x
2. Step 2: Convert to fraction form
   2,640.09/3,642.77 = 1,577.58/x
3. Step 3: Cross multiply
   2,640.09x = 3,642.77 × 1,577.58
4. Step 4: Simplify right side
   2,640.09x = 5,746,761.10
5. Step 5: Solve for x
   x = 5,746,761.10/2,640.09
6. Step 6: Final answer
   x = 2,176.73