Finding the Third Proportional to 153,387 and 328,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,387 : 328,630.50 = 328,630.50 : x
2. Step 2: Convert to fraction form
   153,387/328,630.50 = 328,630.50/x
3. Step 3: Cross multiply
   153,387x = 328,630.50 × 328,630.50
4. Step 4: Simplify right side
   153,387x = 107,998,005,530.25
5. Step 5: Solve for x
   x = 107,998,005,530.25/153,387
6. Step 6: Final answer
   x = 704,088.39