Finding the Fourth Proportional to 2,272.76, 3,136.52 and 1,278.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.76 : 3,136.52 = 1,278.35 : x
2. Step 2: Convert to fraction form
   2,272.76/3,136.52 = 1,278.35/x
3. Step 3: Cross multiply
   2,272.76x = 3,136.52 × 1,278.35
4. Step 4: Simplify right side
   2,272.76x = 4,009,570.34
5. Step 5: Solve for x
   x = 4,009,570.34/2,272.76
6. Step 6: Final answer
   x = 1,764.19