Finding the Third Proportional to 129,318 and 200,701.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,318 : 200,701.50 = 200,701.50 : x
2. Step 2: Convert to fraction form
   129,318/200,701.50 = 200,701.50/x
3. Step 3: Cross multiply
   129,318x = 200,701.50 × 200,701.50
4. Step 4: Simplify right side
   129,318x = 40,281,092,102.25
5. Step 5: Solve for x
   x = 40,281,092,102.25/129,318
6. Step 6: Final answer
   x = 311,488.67