Finding the Third Proportional to 489,087 and 751,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   489,087 : 751,855.50 = 751,855.50 : x
2. Step 2: Convert to fraction form
   489,087/751,855.50 = 751,855.50/x
3. Step 3: Cross multiply
   489,087x = 751,855.50 × 751,855.50
4. Step 4: Simplify right side
   489,087x = 565,286,692,880.25
5. Step 5: Solve for x
   x = 565,286,692,880.25/489,087
6. Step 6: Final answer
   x = 1,155,799.87