Finding the Fourth Proportional to 1,811.79, 2,499.39 and 1,065.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.79 : 2,499.39 = 1,065.71 : x
2. Step 2: Convert to fraction form
   1,811.79/2,499.39 = 1,065.71/x
3. Step 3: Cross multiply
   1,811.79x = 2,499.39 × 1,065.71
4. Step 4: Simplify right side
   1,811.79x = 2,663,612.42
5. Step 5: Solve for x
   x = 2,663,612.42/1,811.79
6. Step 6: Final answer
   x = 1,470.16