Finding the Fourth Proportional to 2,981.28, 4,470.45 and 900.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.28 : 4,470.45 = 900.89 : x
2. Step 2: Convert to fraction form
   2,981.28/4,470.45 = 900.89/x
3. Step 3: Cross multiply
   2,981.28x = 4,470.45 × 900.89
4. Step 4: Simplify right side
   2,981.28x = 4,027,361.35
5. Step 5: Solve for x
   x = 4,027,361.35/2,981.28
6. Step 6: Final answer
   x = 1,350.88