Finding the Fourth Proportional to 2,031.31, 2,801.77 and 1,245.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.31 : 2,801.77 = 1,245.79 : x
2. Step 2: Convert to fraction form
   2,031.31/2,801.77 = 1,245.79/x
3. Step 3: Cross multiply
   2,031.31x = 2,801.77 × 1,245.79
4. Step 4: Simplify right side
   2,031.31x = 3,490,417.05
5. Step 5: Solve for x
   x = 3,490,417.05/2,031.31
6. Step 6: Final answer
   x = 1,718.31