Finding the Third Proportional to 617,136 and 818,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   617,136 : 818,869.50 = 818,869.50 : x
2. Step 2: Convert to fraction form
   617,136/818,869.50 = 818,869.50/x
3. Step 3: Cross multiply
   617,136x = 818,869.50 × 818,869.50
4. Step 4: Simplify right side
   617,136x = 670,547,258,030.25
5. Step 5: Solve for x
   x = 670,547,258,030.25/617,136
6. Step 6: Final answer
   x = 1,086,546.98