Finding the Fourth Proportional to 1,342.89, 2,012.78 and 684.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.89 : 2,012.78 = 684.14 : x
2. Step 2: Convert to fraction form
   1,342.89/2,012.78 = 684.14/x
3. Step 3: Cross multiply
   1,342.89x = 2,012.78 × 684.14
4. Step 4: Simplify right side
   1,342.89x = 1,377,014.96
5. Step 5: Solve for x
   x = 1,377,014.96/1,342.89
6. Step 6: Final answer
   x = 1,025.41