Finding the Third Proportional to 151,404 and 318,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   151,404 : 318,490.50 = 318,490.50 : x
2. Step 2: Convert to fraction form
   151,404/318,490.50 = 318,490.50/x
3. Step 3: Cross multiply
   151,404x = 318,490.50 × 318,490.50
4. Step 4: Simplify right side
   151,404x = 101,436,198,590.25
5. Step 5: Solve for x
   x = 101,436,198,590.25/151,404
6. Step 6: Final answer
   x = 669,970.40