Finding the Third Proportional to 206,910 and 316,366.50

Step by Step Solution

1. Step 1: Write the proportion equation
   206,910 : 316,366.50 = 316,366.50 : x
2. Step 2: Convert to fraction form
   206,910/316,366.50 = 316,366.50/x
3. Step 3: Cross multiply
   206,910x = 316,366.50 × 316,366.50
4. Step 4: Simplify right side
   206,910x = 100,087,762,322.25
5. Step 5: Solve for x
   x = 100,087,762,322.25/206,910
6. Step 6: Final answer
   x = 483,726.08