Finding the Third Proportional to 155,106 and 319,909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,106 : 319,909.50 = 319,909.50 : x
2. Step 2: Convert to fraction form
   155,106/319,909.50 = 319,909.50/x
3. Step 3: Cross multiply
   155,106x = 319,909.50 × 319,909.50
4. Step 4: Simplify right side
   155,106x = 102,342,088,190.25
5. Step 5: Solve for x
   x = 102,342,088,190.25/155,106
6. Step 6: Final answer
   x = 659,820.30