Finding the Third Proportional to 565,145 and 853,477.50

Step by Step Solution

1. Step 1: Write the proportion equation
   565,145 : 853,477.50 = 853,477.50 : x
2. Step 2: Convert to fraction form
   565,145/853,477.50 = 853,477.50/x
3. Step 3: Cross multiply
   565,145x = 853,477.50 × 853,477.50
4. Step 4: Simplify right side
   565,145x = 728,423,843,006.25
5. Step 5: Solve for x
   x = 728,423,843,006.25/565,145
6. Step 6: Final answer
   x = 1,288,914.96