Finding the Fourth Proportional to 2,622.48, 3,933.90 and 890.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.48 : 3,933.90 = 890.52 : x
2. Step 2: Convert to fraction form
   2,622.48/3,933.90 = 890.52/x
3. Step 3: Cross multiply
   2,622.48x = 3,933.90 × 890.52
4. Step 4: Simplify right side
   2,622.48x = 3,503,216.63
5. Step 5: Solve for x
   x = 3,503,216.63/2,622.48
6. Step 6: Final answer
   x = 1,335.84