Finding the Fourth Proportional to 1,327.05, 1,825.74 and 1,290.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327.05 : 1,825.74 = 1,290.60 : x
2. Step 2: Convert to fraction form
   1,327.05/1,825.74 = 1,290.60/x
3. Step 3: Cross multiply
   1,327.05x = 1,825.74 × 1,290.60
4. Step 4: Simplify right side
   1,327.05x = 2,356,300.04
5. Step 5: Solve for x
   x = 2,356,300.04/1,327.05
6. Step 6: Final answer
   x = 1,775.59