Finding the Third Proportional to 1,015,438 and 2,161,280

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,438 : 2,161,280 = 2,161,280 : x
2. Step 2: Convert to fraction form
   1,015,438/2,161,280 = 2,161,280/x
3. Step 3: Cross multiply
   1,015,438x = 2,161,280 × 2,161,280
4. Step 4: Simplify right side
   1,015,438x = 4,671,131,238,400
5. Step 5: Solve for x
   x = 4,671,131,238,400/1,015,438
6. Step 6: Final answer
   x = 4,600,114.67