Finding the Fourth Proportional to 1,896.30, 2,616.18 and 1,305.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.30 : 2,616.18 = 1,305.78 : x
2. Step 2: Convert to fraction form
   1,896.30/2,616.18 = 1,305.78/x
3. Step 3: Cross multiply
   1,896.30x = 2,616.18 × 1,305.78
4. Step 4: Simplify right side
   1,896.30x = 3,416,155.52
5. Step 5: Solve for x
   x = 3,416,155.52/1,896.30
6. Step 6: Final answer
   x = 1,801.48