Finding the Fourth Proportional to 2,587.48, 3,900.72 and 2,420.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.48 : 3,900.72 = 2,420.44 : x
2. Step 2: Convert to fraction form
   2,587.48/3,900.72 = 2,420.44/x
3. Step 3: Cross multiply
   2,587.48x = 3,900.72 × 2,420.44
4. Step 4: Simplify right side
   2,587.48x = 9,441,458.72
5. Step 5: Solve for x
   x = 9,441,458.72/2,587.48
6. Step 6: Final answer
   x = 3,648.90