Finding the Fourth Proportional to 2,031.83, 3,048.20 and 645.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.83 : 3,048.20 = 645.25 : x
2. Step 2: Convert to fraction form
   2,031.83/3,048.20 = 645.25/x
3. Step 3: Cross multiply
   2,031.83x = 3,048.20 × 645.25
4. Step 4: Simplify right side
   2,031.83x = 1,966,851.05
5. Step 5: Solve for x
   x = 1,966,851.05/2,031.83
6. Step 6: Final answer
   x = 968.02