Finding the Third Proportional to 164,129 and 253,569.50

Step by Step Solution

1. Step 1: Write the proportion equation
   164,129 : 253,569.50 = 253,569.50 : x
2. Step 2: Convert to fraction form
   164,129/253,569.50 = 253,569.50/x
3. Step 3: Cross multiply
   164,129x = 253,569.50 × 253,569.50
4. Step 4: Simplify right side
   164,129x = 64,297,491,330.25
5. Step 5: Solve for x
   x = 64,297,491,330.25/164,129
6. Step 6: Final answer
   x = 391,749.73