Finding the Third Proportional to 1,391.81 and 2,167.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.81 : 2,167.69 = 2,167.69 : x
2. Step 2: Convert to fraction form
   1,391.81/2,167.69 = 2,167.69/x
3. Step 3: Cross multiply
   1,391.81x = 2,167.69 × 2,167.69
4. Step 4: Simplify right side
   1,391.81x = 4,698,869.10
5. Step 5: Solve for x
   x = 4,698,869.10/1,391.81
6. Step 6: Final answer
   x = 3,376.08