Finding the Third Proportional to 428,530.50 and 818,181

Step by Step Solution

1. Step 1: Write the proportion equation
   428,530.50 : 818,181 = 818,181 : x
2. Step 2: Convert to fraction form
   428,530.50/818,181 = 818,181/x
3. Step 3: Cross multiply
   428,530.50x = 818,181 × 818,181
4. Step 4: Simplify right side
   428,530.50x = 669,420,148,761
5. Step 5: Solve for x
   x = 669,420,148,761/428,530.50
6. Step 6: Final answer
   x = 1,562,129.53