Finding the Third Proportional to 548,400 and 847,493.25

Step by Step Solution

1. Step 1: Write the proportion equation
   548,400 : 847,493.25 = 847,493.25 : x
2. Step 2: Convert to fraction form
   548,400/847,493.25 = 847,493.25/x
3. Step 3: Cross multiply
   548,400x = 847,493.25 × 847,493.25
4. Step 4: Simplify right side
   548,400x = 718,244,808,795.56
5. Step 5: Solve for x
   x = 718,244,808,795.56/548,400
6. Step 6: Final answer
   x = 1,309,709.72