Finding the Fourth Proportional to 1,671.38, 2,303.72 and 1,355.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.38 : 2,303.72 = 1,355.48 : x
2. Step 2: Convert to fraction form
   1,671.38/2,303.72 = 1,355.48/x
3. Step 3: Cross multiply
   1,671.38x = 2,303.72 × 1,355.48
4. Step 4: Simplify right side
   1,671.38x = 3,122,650.96
5. Step 5: Solve for x
   x = 3,122,650.96/1,671.38
6. Step 6: Final answer
   x = 1,868.30