Finding the Fourth Proportional to 1,018.06, 1,408.61 and 887.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.06 : 1,408.61 = 887.35 : x
2. Step 2: Convert to fraction form
   1,018.06/1,408.61 = 887.35/x
3. Step 3: Cross multiply
   1,018.06x = 1,408.61 × 887.35
4. Step 4: Simplify right side
   1,018.06x = 1,249,928.78
5. Step 5: Solve for x
   x = 1,249,928.78/1,018.06
6. Step 6: Final answer
   x = 1,227.76