Finding the Fourth Proportional to 1,539.69, 2,311.31 and 884.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.69 : 2,311.31 = 884.05 : x
2. Step 2: Convert to fraction form
   1,539.69/2,311.31 = 884.05/x
3. Step 3: Cross multiply
   1,539.69x = 2,311.31 × 884.05
4. Step 4: Simplify right side
   1,539.69x = 2,043,313.61
5. Step 5: Solve for x
   x = 2,043,313.61/1,539.69
6. Step 6: Final answer
   x = 1,327.09