Finding the Fourth Proportional to 2,086.18, 2,877.68 and 1,378.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.18 : 2,877.68 = 1,378.03 : x
2. Step 2: Convert to fraction form
   2,086.18/2,877.68 = 1,378.03/x
3. Step 3: Cross multiply
   2,086.18x = 2,877.68 × 1,378.03
4. Step 4: Simplify right side
   2,086.18x = 3,965,522.48
5. Step 5: Solve for x
   x = 3,965,522.48/2,086.18
6. Step 6: Final answer
   x = 1,900.85