Finding the Third Proportional to 140,690 and 308,061.75

Step by Step Solution

1. Step 1: Write the proportion equation
   140,690 : 308,061.75 = 308,061.75 : x
2. Step 2: Convert to fraction form
   140,690/308,061.75 = 308,061.75/x
3. Step 3: Cross multiply
   140,690x = 308,061.75 × 308,061.75
4. Step 4: Simplify right side
   140,690x = 94,902,041,813.06
5. Step 5: Solve for x
   x = 94,902,041,813.06/140,690
6. Step 6: Final answer
   x = 674,547.17