Finding the Third Proportional to 140,517 and 210,778.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,517 : 210,778.50 = 210,778.50 : x
2. Step 2: Convert to fraction form
   140,517/210,778.50 = 210,778.50/x
3. Step 3: Cross multiply
   140,517x = 210,778.50 × 210,778.50
4. Step 4: Simplify right side
   140,517x = 44,427,576,062.25
5. Step 5: Solve for x
   x = 44,427,576,062.25/140,517
6. Step 6: Final answer
   x = 316,172.25