Finding the Third Proportional to 908.72 and 1,904.34

Step by Step Solution

1. Step 1: Write the proportion equation
   908.72 : 1,904.34 = 1,904.34 : x
2. Step 2: Convert to fraction form
   908.72/1,904.34 = 1,904.34/x
3. Step 3: Cross multiply
   908.72x = 1,904.34 × 1,904.34
4. Step 4: Simplify right side
   908.72x = 3,626,525.12
5. Step 5: Solve for x
   x = 3,626,525.12/908.72
6. Step 6: Final answer
   x = 3,990.81