Finding the Fourth Proportional to 1,355.46, 1,871.06 and 1,023.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.46 : 1,871.06 = 1,023.76 : x
2. Step 2: Convert to fraction form
   1,355.46/1,871.06 = 1,023.76/x
3. Step 3: Cross multiply
   1,355.46x = 1,871.06 × 1,023.76
4. Step 4: Simplify right side
   1,355.46x = 1,915,516.39
5. Step 5: Solve for x
   x = 1,915,516.39/1,355.46
6. Step 6: Final answer
   x = 1,413.19