Finding the Third Proportional to 1,173.38 and 1,639.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.38 : 1,639.69 = 1,639.69 : x
2. Step 2: Convert to fraction form
   1,173.38/1,639.69 = 1,639.69/x
3. Step 3: Cross multiply
   1,173.38x = 1,639.69 × 1,639.69
4. Step 4: Simplify right side
   1,173.38x = 2,688,575.10
5. Step 5: Solve for x
   x = 2,688,575.10/1,173.38
6. Step 6: Final answer
   x = 2,291.32