Finding the Third Proportional to 153,499 and 325,520

Step by Step Solution

1. Step 1: Write the proportion equation
   153,499 : 325,520 = 325,520 : x
2. Step 2: Convert to fraction form
   153,499/325,520 = 325,520/x
3. Step 3: Cross multiply
   153,499x = 325,520 × 325,520
4. Step 4: Simplify right side
   153,499x = 105,963,270,400
5. Step 5: Solve for x
   x = 105,963,270,400/153,499
6. Step 6: Final answer
   x = 690,318.96