Finding the Fourth Proportional to 1,355.50, 1,868.78 and 1,076.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.50 : 1,868.78 = 1,076.66 : x
2. Step 2: Convert to fraction form
   1,355.50/1,868.78 = 1,076.66/x
3. Step 3: Cross multiply
   1,355.50x = 1,868.78 × 1,076.66
4. Step 4: Simplify right side
   1,355.50x = 2,012,041.03
5. Step 5: Solve for x
   x = 2,012,041.03/1,355.50
6. Step 6: Final answer
   x = 1,484.35