Finding the Third Proportional to 133,078.50 and 288,301.50

Step by Step Solution

1. Step 1: Write the proportion equation
   133,078.50 : 288,301.50 = 288,301.50 : x
2. Step 2: Convert to fraction form
   133,078.50/288,301.50 = 288,301.50/x
3. Step 3: Cross multiply
   133,078.50x = 288,301.50 × 288,301.50
4. Step 4: Simplify right side
   133,078.50x = 83,117,754,902.25
5. Step 5: Solve for x
   x = 83,117,754,902.25/133,078.50
6. Step 6: Final answer
   x = 624,576.88