Finding the Third Proportional to 222,917 and 342,151.50

Step by Step Solution

1. Step 1: Write the proportion equation
   222,917 : 342,151.50 = 342,151.50 : x
2. Step 2: Convert to fraction form
   222,917/342,151.50 = 342,151.50/x
3. Step 3: Cross multiply
   222,917x = 342,151.50 × 342,151.50
4. Step 4: Simplify right side
   222,917x = 117,067,648,952.25
5. Step 5: Solve for x
   x = 117,067,648,952.25/222,917
6. Step 6: Final answer
   x = 525,162.50