Finding the Third Proportional to 173,403 and 259,402.50

Step by Step Solution

1. Step 1: Write the proportion equation
   173,403 : 259,402.50 = 259,402.50 : x
2. Step 2: Convert to fraction form
   173,403/259,402.50 = 259,402.50/x
3. Step 3: Cross multiply
   173,403x = 259,402.50 × 259,402.50
4. Step 4: Simplify right side
   173,403x = 67,289,657,006.25
5. Step 5: Solve for x
   x = 67,289,657,006.25/173,403
6. Step 6: Final answer
   x = 388,053.59