Finding the Fourth Proportional to 1,851.78, 2,555.69 and 1,065.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.78 : 2,555.69 = 1,065.81 : x
2. Step 2: Convert to fraction form
   1,851.78/2,555.69 = 1,065.81/x
3. Step 3: Cross multiply
   1,851.78x = 2,555.69 × 1,065.81
4. Step 4: Simplify right side
   1,851.78x = 2,723,881.02
5. Step 5: Solve for x
   x = 2,723,881.02/1,851.78
6. Step 6: Final answer
   x = 1,470.95