Finding the Third Proportional to 145,658.50 and 311,558

Step by Step Solution

1. Step 1: Write the proportion equation
   145,658.50 : 311,558 = 311,558 : x
2. Step 2: Convert to fraction form
   145,658.50/311,558 = 311,558/x
3. Step 3: Cross multiply
   145,658.50x = 311,558 × 311,558
4. Step 4: Simplify right side
   145,658.50x = 97,068,387,364
5. Step 5: Solve for x
   x = 97,068,387,364/145,658.50
6. Step 6: Final answer
   x = 666,410.73