Finding the Third Proportional to 912.94 and 1,990.69

Step by Step Solution

1. Step 1: Write the proportion equation
   912.94 : 1,990.69 = 1,990.69 : x
2. Step 2: Convert to fraction form
   912.94/1,990.69 = 1,990.69/x
3. Step 3: Cross multiply
   912.94x = 1,990.69 × 1,990.69
4. Step 4: Simplify right side
   912.94x = 3,962,836.72
5. Step 5: Solve for x
   x = 3,962,836.72/912.94
6. Step 6: Final answer
   x = 4,340.75