Finding the Fourth Proportional to 3,439.10, 5,164.05 and 1,981.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.10 : 5,164.05 = 1,981.10 : x
2. Step 2: Convert to fraction form
   3,439.10/5,164.05 = 1,981.10/x
3. Step 3: Cross multiply
   3,439.10x = 5,164.05 × 1,981.10
4. Step 4: Simplify right side
   3,439.10x = 10,230,499.46
5. Step 5: Solve for x
   x = 10,230,499.46/3,439.10
6. Step 6: Final answer
   x = 2,974.76