Finding the Fourth Proportional to 1,355.66, 1,870.73 and 876.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.66 : 1,870.73 = 876.27 : x
2. Step 2: Convert to fraction form
   1,355.66/1,870.73 = 876.27/x
3. Step 3: Cross multiply
   1,355.66x = 1,870.73 × 876.27
4. Step 4: Simplify right side
   1,355.66x = 1,639,266.77
5. Step 5: Solve for x
   x = 1,639,266.77/1,355.66
6. Step 6: Final answer
   x = 1,209.20