Finding the Fourth Proportional to 2,622.34, 3,933.87 and 890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.34 : 3,933.87 = 890.50 : x
2. Step 2: Convert to fraction form
   2,622.34/3,933.87 = 890.50/x
3. Step 3: Cross multiply
   2,622.34x = 3,933.87 × 890.50
4. Step 4: Simplify right side
   2,622.34x = 3,503,111.24
5. Step 5: Solve for x
   x = 3,503,111.24/2,622.34
6. Step 6: Final answer
   x = 1,335.87