Finding the Fourth Proportional to 2,031.78, 3,047.40 and 862.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.78 : 3,047.40 = 862.25 : x
2. Step 2: Convert to fraction form
   2,031.78/3,047.40 = 862.25/x
3. Step 3: Cross multiply
   2,031.78x = 3,047.40 × 862.25
4. Step 4: Simplify right side
   2,031.78x = 2,627,616.34
5. Step 5: Solve for x
   x = 2,627,616.34/2,031.78
6. Step 6: Final answer
   x = 1,293.26