Finding the Third Proportional to 146,356 and 315,284

Step by Step Solution

1. Step 1: Write the proportion equation
   146,356 : 315,284 = 315,284 : x
2. Step 2: Convert to fraction form
   146,356/315,284 = 315,284/x
3. Step 3: Cross multiply
   146,356x = 315,284 × 315,284
4. Step 4: Simplify right side
   146,356x = 99,404,000,656
5. Step 5: Solve for x
   x = 99,404,000,656/146,356
6. Step 6: Final answer
   x = 679,193.20