Finding the Third Proportional to 912 and 1,989.38

Step by Step Solution

1. Step 1: Write the proportion equation
   912 : 1,989.38 = 1,989.38 : x
2. Step 2: Convert to fraction form
   912/1,989.38 = 1,989.38/x
3. Step 3: Cross multiply
   912x = 1,989.38 × 1,989.38
4. Step 4: Simplify right side
   912x = 3,957,612.89
5. Step 5: Solve for x
   x = 3,957,612.89/912
6. Step 6: Final answer
   x = 4,339.49