Finding the Fourth Proportional to 1,896.72, 2,616.24 and 1,338

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.72 : 2,616.24 = 1,338 : x
2. Step 2: Convert to fraction form
   1,896.72/2,616.24 = 1,338/x
3. Step 3: Cross multiply
   1,896.72x = 2,616.24 × 1,338
4. Step 4: Simplify right side
   1,896.72x = 3,500,529.12
5. Step 5: Solve for x
   x = 3,500,529.12/1,896.72
6. Step 6: Final answer
   x = 1,845.57