Finding the Fourth Proportional to 3,710.40, 5,120.15 and 2,031.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,710.40 : 5,120.15 = 2,031.48 : x
2. Step 2: Convert to fraction form
   3,710.40/5,120.15 = 2,031.48/x
3. Step 3: Cross multiply
   3,710.40x = 5,120.15 × 2,031.48
4. Step 4: Simplify right side
   3,710.40x = 10,401,446.56
5. Step 5: Solve for x
   x = 10,401,446.56/3,710.40
6. Step 6: Final answer
   x = 2,803.32