Finding the Fourth Proportional to 2,213.71, 3,321.71 and 981.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.71 : 3,321.71 = 981.97 : x
2. Step 2: Convert to fraction form
   2,213.71/3,321.71 = 981.97/x
3. Step 3: Cross multiply
   2,213.71x = 3,321.71 × 981.97
4. Step 4: Simplify right side
   2,213.71x = 3,261,819.57
5. Step 5: Solve for x
   x = 3,261,819.57/2,213.71
6. Step 6: Final answer
   x = 1,473.46