Finding the Third Proportional to 915,781 and 1,989,206

Step by Step Solution

1. Step 1: Write the proportion equation
   915,781 : 1,989,206 = 1,989,206 : x
2. Step 2: Convert to fraction form
   915,781/1,989,206 = 1,989,206/x
3. Step 3: Cross multiply
   915,781x = 1,989,206 × 1,989,206
4. Step 4: Simplify right side
   915,781x = 3,956,940,510,436
5. Step 5: Solve for x
   x = 3,956,940,510,436/915,781
6. Step 6: Final answer
   x = 4,320,837.09