Finding the Third Proportional to 173,242 and 259,156.75

Step by Step Solution

1. Step 1: Write the proportion equation
   173,242 : 259,156.75 = 259,156.75 : x
2. Step 2: Convert to fraction form
   173,242/259,156.75 = 259,156.75/x
3. Step 3: Cross multiply
   173,242x = 259,156.75 × 259,156.75
4. Step 4: Simplify right side
   173,242x = 67,162,221,070.56
5. Step 5: Solve for x
   x = 67,162,221,070.56/173,242
6. Step 6: Final answer
   x = 387,678.63