Finding the Third Proportional to 428,597 and 916,242

Step by Step Solution

1. Step 1: Write the proportion equation
   428,597 : 916,242 = 916,242 : x
2. Step 2: Convert to fraction form
   428,597/916,242 = 916,242/x
3. Step 3: Cross multiply
   428,597x = 916,242 × 916,242
4. Step 4: Simplify right side
   428,597x = 839,499,402,564
5. Step 5: Solve for x
   x = 839,499,402,564/428,597
6. Step 6: Final answer
   x = 1,958,715.07