Finding the Fourth Proportional to 2,987.18, 4,472.25 and 2,371.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.18 : 4,472.25 = 2,371.78 : x
2. Step 2: Convert to fraction form
   2,987.18/4,472.25 = 2,371.78/x
3. Step 3: Cross multiply
   2,987.18x = 4,472.25 × 2,371.78
4. Step 4: Simplify right side
   2,987.18x = 10,607,189.80
5. Step 5: Solve for x
   x = 10,607,189.80/2,987.18
6. Step 6: Final answer
   x = 3,550.91