Finding the Third Proportional to 140,309 and 210,623.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,309 : 210,623.50 = 210,623.50 : x
2. Step 2: Convert to fraction form
   140,309/210,623.50 = 210,623.50/x
3. Step 3: Cross multiply
   140,309x = 210,623.50 × 210,623.50
4. Step 4: Simplify right side
   140,309x = 44,362,258,752.25
5. Step 5: Solve for x
   x = 44,362,258,752.25/140,309
6. Step 6: Final answer
   x = 316,175.43