Finding the Fourth Proportional to 1,982.50, 2,991.17 and 1,966.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,982.50 : 2,991.17 = 1,966.10 : x
2. Step 2: Convert to fraction form
   1,982.50/2,991.17 = 1,966.10/x
3. Step 3: Cross multiply
   1,982.50x = 2,991.17 × 1,966.10
4. Step 4: Simplify right side
   1,982.50x = 5,880,929.30
5. Step 5: Solve for x
   x = 5,880,929.30/1,982.50
6. Step 6: Final answer
   x = 2,966.42