Finding the Third Proportional to 128,763 and 171,922.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,763 : 171,922.50 = 171,922.50 : x
2. Step 2: Convert to fraction form
   128,763/171,922.50 = 171,922.50/x
3. Step 3: Cross multiply
   128,763x = 171,922.50 × 171,922.50
4. Step 4: Simplify right side
   128,763x = 29,557,346,006.25
5. Step 5: Solve for x
   x = 29,557,346,006.25/128,763
6. Step 6: Final answer
   x = 229,548.44