Finding the Fourth Proportional to 2,646.86, 3,647.61 and 1,899.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.86 : 3,647.61 = 1,899.59 : x
2. Step 2: Convert to fraction form
   2,646.86/3,647.61 = 1,899.59/x
3. Step 3: Cross multiply
   2,646.86x = 3,647.61 × 1,899.59
4. Step 4: Simplify right side
   2,646.86x = 6,928,945.24
5. Step 5: Solve for x
   x = 6,928,945.24/2,646.86
6. Step 6: Final answer
   x = 2,617.80