Finding the Third Proportional to 142,915.50 and 304,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,915.50 : 304,816.50 = 304,816.50 : x
2. Step 2: Convert to fraction form
   142,915.50/304,816.50 = 304,816.50/x
3. Step 3: Cross multiply
   142,915.50x = 304,816.50 × 304,816.50
4. Step 4: Simplify right side
   142,915.50x = 92,913,098,672.25
5. Step 5: Solve for x
   x = 92,913,098,672.25/142,915.50
6. Step 6: Final answer
   x = 650,126.11