Finding the Third Proportional to 145,678.50 and 317,835

Step by Step Solution

1. Step 1: Write the proportion equation
   145,678.50 : 317,835 = 317,835 : x
2. Step 2: Convert to fraction form
   145,678.50/317,835 = 317,835/x
3. Step 3: Cross multiply
   145,678.50x = 317,835 × 317,835
4. Step 4: Simplify right side
   145,678.50x = 101,019,087,225
5. Step 5: Solve for x
   x = 101,019,087,225/145,678.50
6. Step 6: Final answer
   x = 693,438.55