Finding the Fourth Proportional to 3,081.30, 4,622.67 and 890.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,081.30 : 4,622.67 = 890.07 : x
2. Step 2: Convert to fraction form
   3,081.30/4,622.67 = 890.07/x
3. Step 3: Cross multiply
   3,081.30x = 4,622.67 × 890.07
4. Step 4: Simplify right side
   3,081.30x = 4,114,499.89
5. Step 5: Solve for x
   x = 4,114,499.89/3,081.30
6. Step 6: Final answer
   x = 1,335.31