Finding the Third Proportional to 142,344.84 and 309,600.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,344.84 : 309,600.56 = 309,600.56 : x
2. Step 2: Convert to fraction form
   142,344.84/309,600.56 = 309,600.56/x
3. Step 3: Cross multiply
   142,344.84x = 309,600.56 × 309,600.56
4. Step 4: Simplify right side
   142,344.84x = 95,852,508,300.32
5. Step 5: Solve for x
   x = 95,852,508,300.32/142,344.84
6. Step 6: Final answer
   x = 673,382.37