Finding the Fourth Proportional to 1,355.54, 1,868.20 and 1,023.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.54 : 1,868.20 = 1,023.17 : x
2. Step 2: Convert to fraction form
   1,355.54/1,868.20 = 1,023.17/x
3. Step 3: Cross multiply
   1,355.54x = 1,868.20 × 1,023.17
4. Step 4: Simplify right side
   1,355.54x = 1,911,474.30
5. Step 5: Solve for x
   x = 1,911,474.30/1,355.54
6. Step 6: Final answer
   x = 1,410.13