Finding the Third Proportional to 858,645 and 1,864,912.50

Step by Step Solution

1. Step 1: Write the proportion equation
   858,645 : 1,864,912.50 = 1,864,912.50 : x
2. Step 2: Convert to fraction form
   858,645/1,864,912.50 = 1,864,912.50/x
3. Step 3: Cross multiply
   858,645x = 1,864,912.50 × 1,864,912.50
4. Step 4: Simplify right side
   858,645x = 3,477,898,632,656.25
5. Step 5: Solve for x
   x = 3,477,898,632,656.25/858,645
6. Step 6: Final answer
   x = 4,050,449.99