Finding the Third Proportional to 152,215 and 328,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,215 : 328,561.50 = 328,561.50 : x
2. Step 2: Convert to fraction form
   152,215/328,561.50 = 328,561.50/x
3. Step 3: Cross multiply
   152,215x = 328,561.50 × 328,561.50
4. Step 4: Simplify right side
   152,215x = 107,952,659,282.25
5. Step 5: Solve for x
   x = 107,952,659,282.25/152,215
6. Step 6: Final answer
   x = 709,211.70