Finding the Fourth Proportional to 2,272.81, 3,136.46 and 1,278.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.81 : 3,136.46 = 1,278.10 : x
2. Step 2: Convert to fraction form
   2,272.81/3,136.46 = 1,278.10/x
3. Step 3: Cross multiply
   2,272.81x = 3,136.46 × 1,278.10
4. Step 4: Simplify right side
   2,272.81x = 4,008,709.53
5. Step 5: Solve for x
   x = 4,008,709.53/2,272.81
6. Step 6: Final answer
   x = 1,763.77