Finding the Fourth Proportional to 2,031.57, 2,803.77 and 1,245.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.57 : 2,803.77 = 1,245.15 : x
2. Step 2: Convert to fraction form
   2,031.57/2,803.77 = 1,245.15/x
3. Step 3: Cross multiply
   2,031.57x = 2,803.77 × 1,245.15
4. Step 4: Simplify right side
   2,031.57x = 3,491,114.22
5. Step 5: Solve for x
   x = 3,491,114.22/2,031.57
6. Step 6: Final answer
   x = 1,718.43