Finding the Fourth Proportional to 1,854.66, 2,556.72 and 1,329.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,854.66 : 2,556.72 = 1,329.78 : x
2. Step 2: Convert to fraction form
   1,854.66/2,556.72 = 1,329.78/x
3. Step 3: Cross multiply
   1,854.66x = 2,556.72 × 1,329.78
4. Step 4: Simplify right side
   1,854.66x = 3,399,875.12
5. Step 5: Solve for x
   x = 3,399,875.12/1,854.66
6. Step 6: Final answer
   x = 1,833.15