Finding the Third Proportional to 152,707.50 and 328,828.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,707.50 : 328,828.50 = 328,828.50 : x
2. Step 2: Convert to fraction form
   152,707.50/328,828.50 = 328,828.50/x
3. Step 3: Cross multiply
   152,707.50x = 328,828.50 × 328,828.50
4. Step 4: Simplify right side
   152,707.50x = 108,128,182,412.25
5. Step 5: Solve for x
   x = 108,128,182,412.25/152,707.50
6. Step 6: Final answer
   x = 708,073.82