Finding the Third Proportional to 140,971 and 309,981.25

Step by Step Solution

1. Step 1: Write the proportion equation
   140,971 : 309,981.25 = 309,981.25 : x
2. Step 2: Convert to fraction form
   140,971/309,981.25 = 309,981.25/x
3. Step 3: Cross multiply
   140,971x = 309,981.25 × 309,981.25
4. Step 4: Simplify right side
   140,971x = 96,088,375,351.56
5. Step 5: Solve for x
   x = 96,088,375,351.56/140,971
6. Step 6: Final answer
   x = 681,618.03