Finding the Third Proportional to 385,087 and 858,717.50

Step by Step Solution

1. Step 1: Write the proportion equation
   385,087 : 858,717.50 = 858,717.50 : x
2. Step 2: Convert to fraction form
   385,087/858,717.50 = 858,717.50/x
3. Step 3: Cross multiply
   385,087x = 858,717.50 × 858,717.50
4. Step 4: Simplify right side
   385,087x = 737,395,744,806.25
5. Step 5: Solve for x
   x = 737,395,744,806.25/385,087
6. Step 6: Final answer
   x = 1,914,880.91