Finding the Third Proportional to 259,429.50 and 331,492.50

Step by Step Solution

1. Step 1: Write the proportion equation
   259,429.50 : 331,492.50 = 331,492.50 : x
2. Step 2: Convert to fraction form
   259,429.50/331,492.50 = 331,492.50/x
3. Step 3: Cross multiply
   259,429.50x = 331,492.50 × 331,492.50
4. Step 4: Simplify right side
   259,429.50x = 109,887,277,556.25
5. Step 5: Solve for x
   x = 109,887,277,556.25/259,429.50
6. Step 6: Final answer
   x = 423,572.79