Finding the Third Proportional to 258,183 and 371,857.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,183 : 371,857.50 = 371,857.50 : x
2. Step 2: Convert to fraction form
   258,183/371,857.50 = 371,857.50/x
3. Step 3: Cross multiply
   258,183x = 371,857.50 × 371,857.50
4. Step 4: Simplify right side
   258,183x = 138,278,000,306.25
5. Step 5: Solve for x
   x = 138,278,000,306.25/258,183
6. Step 6: Final answer
   x = 535,581.35