Finding the Third Proportional to 140,971.50 and 317,430

Step by Step Solution

1. Step 1: Write the proportion equation
   140,971.50 : 317,430 = 317,430 : x
2. Step 2: Convert to fraction form
   140,971.50/317,430 = 317,430/x
3. Step 3: Cross multiply
   140,971.50x = 317,430 × 317,430
4. Step 4: Simplify right side
   140,971.50x = 100,761,804,900
5. Step 5: Solve for x
   x = 100,761,804,900/140,971.50
6. Step 6: Final answer
   x = 714,767.20