Finding the Third Proportional to 399,006 and 886,585.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,006 : 886,585.50 = 886,585.50 : x
2. Step 2: Convert to fraction form
   399,006/886,585.50 = 886,585.50/x
3. Step 3: Cross multiply
   399,006x = 886,585.50 × 886,585.50
4. Step 4: Simplify right side
   399,006x = 786,033,848,810.25
5. Step 5: Solve for x
   x = 786,033,848,810.25/399,006
6. Step 6: Final answer
   x = 1,969,980.02