Finding the Fourth Proportional to 2,074.82, 2,862.74 and 1,288.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.82 : 2,862.74 = 1,288.31 : x
2. Step 2: Convert to fraction form
   2,074.82/2,862.74 = 1,288.31/x
3. Step 3: Cross multiply
   2,074.82x = 2,862.74 × 1,288.31
4. Step 4: Simplify right side
   2,074.82x = 3,688,085.48
5. Step 5: Solve for x
   x = 3,688,085.48/2,074.82
6. Step 6: Final answer
   x = 1,777.55