Finding the Third Proportional to 271,815 and 391,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,815 : 391,522.50 = 391,522.50 : x
2. Step 2: Convert to fraction form
   271,815/391,522.50 = 391,522.50/x
3. Step 3: Cross multiply
   271,815x = 391,522.50 × 391,522.50
4. Step 4: Simplify right side
   271,815x = 153,289,868,006.25
5. Step 5: Solve for x
   x = 153,289,868,006.25/271,815
6. Step 6: Final answer
   x = 563,949.26