Finding the Fourth Proportional to 1,942.71, 2,682.71 and 1,245.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.71 : 2,682.71 = 1,245.30 : x
2. Step 2: Convert to fraction form
   1,942.71/2,682.71 = 1,245.30/x
3. Step 3: Cross multiply
   1,942.71x = 2,682.71 × 1,245.30
4. Step 4: Simplify right side
   1,942.71x = 3,340,778.76
5. Step 5: Solve for x
   x = 3,340,778.76/1,942.71
6. Step 6: Final answer
   x = 1,719.65