Finding the Fourth Proportional to 2,272.96, 3,136.69 and 1,278.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.96 : 3,136.69 = 1,278.43 : x
2. Step 2: Convert to fraction form
   2,272.96/3,136.69 = 1,278.43/x
3. Step 3: Cross multiply
   2,272.96x = 3,136.69 × 1,278.43
4. Step 4: Simplify right side
   2,272.96x = 4,010,050.62
5. Step 5: Solve for x
   x = 4,010,050.62/2,272.96
6. Step 6: Final answer
   x = 1,764.24