Finding the Third Proportional to 385,086 and 858,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   385,086 : 858,715.50 = 858,715.50 : x
2. Step 2: Convert to fraction form
   385,086/858,715.50 = 858,715.50/x
3. Step 3: Cross multiply
   385,086x = 858,715.50 × 858,715.50
4. Step 4: Simplify right side
   385,086x = 737,392,309,940.25
5. Step 5: Solve for x
   x = 737,392,309,940.25/385,086
6. Step 6: Final answer
   x = 1,914,876.96