Finding the Third Proportional to 152,353.50 and 323,139

Step by Step Solution

1. Step 1: Write the proportion equation
   152,353.50 : 323,139 = 323,139 : x
2. Step 2: Convert to fraction form
   152,353.50/323,139 = 323,139/x
3. Step 3: Cross multiply
   152,353.50x = 323,139 × 323,139
4. Step 4: Simplify right side
   152,353.50x = 104,418,813,321
5. Step 5: Solve for x
   x = 104,418,813,321/152,353.50
6. Step 6: Final answer
   x = 685,371.94