Finding the Third Proportional to 1,015,509 and 2,189,715

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,509 : 2,189,715 = 2,189,715 : x
2. Step 2: Convert to fraction form
   1,015,509/2,189,715 = 2,189,715/x
3. Step 3: Cross multiply
   1,015,509x = 2,189,715 × 2,189,715
4. Step 4: Simplify right side
   1,015,509x = 4,794,851,781,225
5. Step 5: Solve for x
   x = 4,794,851,781,225/1,015,509
6. Step 6: Final answer
   x = 4,721,624.11