Finding the Third Proportional to 152,780 and 328,963.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,780 : 328,963.50 = 328,963.50 : x
2. Step 2: Convert to fraction form
   152,780/328,963.50 = 328,963.50/x
3. Step 3: Cross multiply
   152,780x = 328,963.50 × 328,963.50
4. Step 4: Simplify right side
   152,780x = 108,216,984,332.25
5. Step 5: Solve for x
   x = 108,216,984,332.25/152,780
6. Step 6: Final answer
   x = 708,319.05