Finding the Fourth Proportional to 2,042.10, 2,817.27 and 1,245.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.10 : 2,817.27 = 1,245.15 : x
2. Step 2: Convert to fraction form
   2,042.10/2,817.27 = 1,245.15/x
3. Step 3: Cross multiply
   2,042.10x = 2,817.27 × 1,245.15
4. Step 4: Simplify right side
   2,042.10x = 3,507,923.74
5. Step 5: Solve for x
   x = 3,507,923.74/2,042.10
6. Step 6: Final answer
   x = 1,717.80