Finding the Third Proportional to 143,825.50 and 312,902

Step by Step Solution

1. Step 1: Write the proportion equation
   143,825.50 : 312,902 = 312,902 : x
2. Step 2: Convert to fraction form
   143,825.50/312,902 = 312,902/x
3. Step 3: Cross multiply
   143,825.50x = 312,902 × 312,902
4. Step 4: Simplify right side
   143,825.50x = 97,907,661,604
5. Step 5: Solve for x
   x = 97,907,661,604/143,825.50
6. Step 6: Final answer
   x = 680,739.24