Finding the Third Proportional to 142,606.50 and 309,846

Step by Step Solution

1. Step 1: Write the proportion equation
   142,606.50 : 309,846 = 309,846 : x
2. Step 2: Convert to fraction form
   142,606.50/309,846 = 309,846/x
3. Step 3: Cross multiply
   142,606.50x = 309,846 × 309,846
4. Step 4: Simplify right side
   142,606.50x = 96,004,543,716
5. Step 5: Solve for x
   x = 96,004,543,716/142,606.50
6. Step 6: Final answer
   x = 673,212.96