Finding the Third Proportional to 222,116 and 499,978

Step by Step Solution

1. Step 1: Write the proportion equation
   222,116 : 499,978 = 499,978 : x
2. Step 2: Convert to fraction form
   222,116/499,978 = 499,978/x
3. Step 3: Cross multiply
   222,116x = 499,978 × 499,978
4. Step 4: Simplify right side
   222,116x = 249,978,000,484
5. Step 5: Solve for x
   x = 249,978,000,484/222,116
6. Step 6: Final answer
   x = 1,125,438.96