Finding the Third Proportional to 981.50 and 2,078

Step by Step Solution

1. Step 1: Write the proportion equation
   981.50 : 2,078 = 2,078 : x
2. Step 2: Convert to fraction form
   981.50/2,078 = 2,078/x
3. Step 3: Cross multiply
   981.50x = 2,078 × 2,078
4. Step 4: Simplify right side
   981.50x = 4,318,084
5. Step 5: Solve for x
   x = 4,318,084/981.50
6. Step 6: Final answer
   x = 4,399.47