Finding the Third Proportional to 915,790 and 1,989,224

Step by Step Solution

1. Step 1: Write the proportion equation
   915,790 : 1,989,224 = 1,989,224 : x
2. Step 2: Convert to fraction form
   915,790/1,989,224 = 1,989,224/x
3. Step 3: Cross multiply
   915,790x = 1,989,224 × 1,989,224
4. Step 4: Simplify right side
   915,790x = 3,957,012,122,176
5. Step 5: Solve for x
   x = 3,957,012,122,176/915,790
6. Step 6: Final answer
   x = 4,320,872.82