Finding the Fourth Proportional to 2,078.60, 3,118.70 and 1,429

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.60 : 3,118.70 = 1,429 : x
2. Step 2: Convert to fraction form
   2,078.60/3,118.70 = 1,429/x
3. Step 3: Cross multiply
   2,078.60x = 3,118.70 × 1,429
4. Step 4: Simplify right side
   2,078.60x = 4,456,622.30
5. Step 5: Solve for x
   x = 4,456,622.30/2,078.60
6. Step 6: Final answer
   x = 2,144.05