Finding the Third Proportional to 209,050.50 and 315,534

Step by Step Solution

1. Step 1: Write the proportion equation
   209,050.50 : 315,534 = 315,534 : x
2. Step 2: Convert to fraction form
   209,050.50/315,534 = 315,534/x
3. Step 3: Cross multiply
   209,050.50x = 315,534 × 315,534
4. Step 4: Simplify right side
   209,050.50x = 99,561,705,156
5. Step 5: Solve for x
   x = 99,561,705,156/209,050.50
6. Step 6: Final answer
   x = 476,256.72