Finding the Fourth Proportional to 1,851.80, 2,555.42 and 1,065.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.80 : 2,555.42 = 1,065.69 : x
2. Step 2: Convert to fraction form
   1,851.80/2,555.42 = 1,065.69/x
3. Step 3: Cross multiply
   1,851.80x = 2,555.42 × 1,065.69
4. Step 4: Simplify right side
   1,851.80x = 2,723,280.21
5. Step 5: Solve for x
   x = 2,723,280.21/1,851.80
6. Step 6: Final answer
   x = 1,470.62