Finding the Fourth Proportional to 1,811.95, 2,499.60 and 1,065.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.95 : 2,499.60 = 1,065.43 : x
2. Step 2: Convert to fraction form
   1,811.95/2,499.60 = 1,065.43/x
3. Step 3: Cross multiply
   1,811.95x = 2,499.60 × 1,065.43
4. Step 4: Simplify right side
   1,811.95x = 2,663,148.83
5. Step 5: Solve for x
   x = 2,663,148.83/1,811.95
6. Step 6: Final answer
   x = 1,469.77