Finding the Third Proportional to 172,677 and 353,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,677 : 353,911.50 = 353,911.50 : x
2. Step 2: Convert to fraction form
   172,677/353,911.50 = 353,911.50/x
3. Step 3: Cross multiply
   172,677x = 353,911.50 × 353,911.50
4. Step 4: Simplify right side
   172,677x = 125,253,349,832.25
5. Step 5: Solve for x
   x = 125,253,349,832.25/172,677
6. Step 6: Final answer
   x = 725,362.09