Finding the Fourth Proportional to 2,987.11, 4,479.58 and 1,012.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.11 : 4,479.58 = 1,012.42 : x
2. Step 2: Convert to fraction form
   2,987.11/4,479.58 = 1,012.42/x
3. Step 3: Cross multiply
   2,987.11x = 4,479.58 × 1,012.42
4. Step 4: Simplify right side
   2,987.11x = 4,535,216.38
5. Step 5: Solve for x
   x = 4,535,216.38/2,987.11
6. Step 6: Final answer
   x = 1,518.26