Finding the Third Proportional to 436,914 and 686,535.75

Step by Step Solution

1. Step 1: Write the proportion equation
   436,914 : 686,535.75 = 686,535.75 : x
2. Step 2: Convert to fraction form
   436,914/686,535.75 = 686,535.75/x
3. Step 3: Cross multiply
   436,914x = 686,535.75 × 686,535.75
4. Step 4: Simplify right side
   436,914x = 471,331,336,028.06
5. Step 5: Solve for x
   x = 471,331,336,028.06/436,914
6. Step 6: Final answer
   x = 1,078,773.71