Finding the Fourth Proportional to 2,070.82, 3,106.73 and 1,031.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.82 : 3,106.73 = 1,031.31 : x
2. Step 2: Convert to fraction form
   2,070.82/3,106.73 = 1,031.31/x
3. Step 3: Cross multiply
   2,070.82x = 3,106.73 × 1,031.31
4. Step 4: Simplify right side
   2,070.82x = 3,204,001.72
5. Step 5: Solve for x
   x = 3,204,001.72/2,070.82
6. Step 6: Final answer
   x = 1,547.21