Finding the Fourth Proportional to 2,664.21, 3,991.45 and 1,488.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.21 : 3,991.45 = 1,488.09 : x
2. Step 2: Convert to fraction form
   2,664.21/3,991.45 = 1,488.09/x
3. Step 3: Cross multiply
   2,664.21x = 3,991.45 × 1,488.09
4. Step 4: Simplify right side
   2,664.21x = 5,939,636.83
5. Step 5: Solve for x
   x = 5,939,636.83/2,664.21
6. Step 6: Final answer
   x = 2,229.42