Finding the Fourth Proportional to 2,987.96, 4,482.46 and 1,139.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.96 : 4,482.46 = 1,139.24 : x
2. Step 2: Convert to fraction form
   2,987.96/4,482.46 = 1,139.24/x
3. Step 3: Cross multiply
   2,987.96x = 4,482.46 × 1,139.24
4. Step 4: Simplify right side
   2,987.96x = 5,106,597.73
5. Step 5: Solve for x
   x = 5,106,597.73/2,987.96
6. Step 6: Final answer
   x = 1,709.06