Finding the Fourth Proportional to 2,665.90, 3,998.55 and 1,022.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.90 : 3,998.55 = 1,022.41 : x
2. Step 2: Convert to fraction form
   2,665.90/3,998.55 = 1,022.41/x
3. Step 3: Cross multiply
   2,665.90x = 3,998.55 × 1,022.41
4. Step 4: Simplify right side
   2,665.90x = 4,088,157.51
5. Step 5: Solve for x
   x = 4,088,157.51/2,665.90
6. Step 6: Final answer
   x = 1,533.50