Finding the Fourth Proportional to 1,665.28, 2,295.55 and 1,370.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.28 : 2,295.55 = 1,370.04 : x
2. Step 2: Convert to fraction form
   1,665.28/2,295.55 = 1,370.04/x
3. Step 3: Cross multiply
   1,665.28x = 2,295.55 × 1,370.04
4. Step 4: Simplify right side
   1,665.28x = 3,144,995.32
5. Step 5: Solve for x
   x = 3,144,995.32/1,665.28
6. Step 6: Final answer
   x = 1,888.57