Finding the Third Proportional to 142,142.34 and 306,428.06

Step by Step Solution

1. Step 1: Write the proportion equation
   142,142.34 : 306,428.06 = 306,428.06 : x
2. Step 2: Convert to fraction form
   142,142.34/306,428.06 = 306,428.06/x
3. Step 3: Cross multiply
   142,142.34x = 306,428.06 × 306,428.06
4. Step 4: Simplify right side
   142,142.34x = 93,898,157,487.50
5. Step 5: Solve for x
   x = 93,898,157,487.50/142,142.34
6. Step 6: Final answer
   x = 660,592.44