Finding the Fourth Proportional to 1,949.79, 2,690.72 and 1,065.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,949.79 : 2,690.72 = 1,065.60 : x
2. Step 2: Convert to fraction form
   1,949.79/2,690.72 = 1,065.60/x
3. Step 3: Cross multiply
   1,949.79x = 2,690.72 × 1,065.60
4. Step 4: Simplify right side
   1,949.79x = 2,867,212.45
5. Step 5: Solve for x
   x = 2,867,212.45/1,949.79
6. Step 6: Final answer
   x = 1,470.52