Finding the Third Proportional to 129,474 and 203,446.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,474 : 203,446.50 = 203,446.50 : x
2. Step 2: Convert to fraction form
   129,474/203,446.50 = 203,446.50/x
3. Step 3: Cross multiply
   129,474x = 203,446.50 × 203,446.50
4. Step 4: Simplify right side
   129,474x = 41,390,478,362.25
5. Step 5: Solve for x
   x = 41,390,478,362.25/129,474
6. Step 6: Final answer
   x = 319,681.78