Finding the Third Proportional to 161,532 and 331,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,532 : 331,123.50 = 331,123.50 : x
2. Step 2: Convert to fraction form
   161,532/331,123.50 = 331,123.50/x
3. Step 3: Cross multiply
   161,532x = 331,123.50 × 331,123.50
4. Step 4: Simplify right side
   161,532x = 109,642,772,252.25
5. Step 5: Solve for x
   x = 109,642,772,252.25/161,532
6. Step 6: Final answer
   x = 678,768.12