Finding the Third Proportional to 142,888.50 and 319,608

Step by Step Solution

1. Step 1: Write the proportion equation
   142,888.50 : 319,608 = 319,608 : x
2. Step 2: Convert to fraction form
   142,888.50/319,608 = 319,608/x
3. Step 3: Cross multiply
   142,888.50x = 319,608 × 319,608
4. Step 4: Simplify right side
   142,888.50x = 102,149,273,664
5. Step 5: Solve for x
   x = 102,149,273,664/142,888.50
6. Step 6: Final answer
   x = 714,888.00