Finding the Third Proportional to 418,485 and 911,701.50

Step by Step Solution

1. Step 1: Write the proportion equation
   418,485 : 911,701.50 = 911,701.50 : x
2. Step 2: Convert to fraction form
   418,485/911,701.50 = 911,701.50/x
3. Step 3: Cross multiply
   418,485x = 911,701.50 × 911,701.50
4. Step 4: Simplify right side
   418,485x = 831,199,625,102.25
5. Step 5: Solve for x
   x = 831,199,625,102.25/418,485
6. Step 6: Final answer
   x = 1,986,211.27