Finding the Third Proportional to 424,869 and 919,438.50

Step by Step Solution

1. Step 1: Write the proportion equation
   424,869 : 919,438.50 = 919,438.50 : x
2. Step 2: Convert to fraction form
   424,869/919,438.50 = 919,438.50/x
3. Step 3: Cross multiply
   424,869x = 919,438.50 × 919,438.50
4. Step 4: Simplify right side
   424,869x = 845,367,155,282.25
5. Step 5: Solve for x
   x = 845,367,155,282.25/424,869
6. Step 6: Final answer
   x = 1,989,712.49