Finding the Fourth Proportional to 1,851.50, 2,555.38 and 1,065.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.50 : 2,555.38 = 1,065.40 : x
2. Step 2: Convert to fraction form
   1,851.50/2,555.38 = 1,065.40/x
3. Step 3: Cross multiply
   1,851.50x = 2,555.38 × 1,065.40
4. Step 4: Simplify right side
   1,851.50x = 2,722,501.85
5. Step 5: Solve for x
   x = 2,722,501.85/1,851.50
6. Step 6: Final answer
   x = 1,470.43