Finding the Third Proportional to 400,086 and 872,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,086 : 872,068.50 = 872,068.50 : x
2. Step 2: Convert to fraction form
   400,086/872,068.50 = 872,068.50/x
3. Step 3: Cross multiply
   400,086x = 872,068.50 × 872,068.50
4. Step 4: Simplify right side
   400,086x = 760,503,468,692.25
5. Step 5: Solve for x
   x = 760,503,468,692.25/400,086
6. Step 6: Final answer
   x = 1,900,849.99