Finding the Fourth Proportional to 2,987.59, 4,479.64 and 1,138.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.59 : 4,479.64 = 1,138.83 : x
2. Step 2: Convert to fraction form
   2,987.59/4,479.64 = 1,138.83/x
3. Step 3: Cross multiply
   2,987.59x = 4,479.64 × 1,138.83
4. Step 4: Simplify right side
   2,987.59x = 5,101,548.42
5. Step 5: Solve for x
   x = 5,101,548.42/2,987.59
6. Step 6: Final answer
   x = 1,707.58