Finding the Third Proportional to 152,784 and 328,970

Step by Step Solution

1. Step 1: Write the proportion equation
   152,784 : 328,970 = 328,970 : x
2. Step 2: Convert to fraction form
   152,784/328,970 = 328,970/x
3. Step 3: Cross multiply
   152,784x = 328,970 × 328,970
4. Step 4: Simplify right side
   152,784x = 108,221,260,900
5. Step 5: Solve for x
   x = 108,221,260,900/152,784
6. Step 6: Final answer
   x = 708,328.50