Finding the Fourth Proportional to 1,991.31, 2,982.33 and 1,922.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.31 : 2,982.33 = 1,922.10 : x
2. Step 2: Convert to fraction form
   1,991.31/2,982.33 = 1,922.10/x
3. Step 3: Cross multiply
   1,991.31x = 2,982.33 × 1,922.10
4. Step 4: Simplify right side
   1,991.31x = 5,732,336.49
5. Step 5: Solve for x
   x = 5,732,336.49/1,991.31
6. Step 6: Final answer
   x = 2,878.68