Finding the Third Proportional to 163,779 and 262,732.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,779 : 262,732.50 = 262,732.50 : x
2. Step 2: Convert to fraction form
   163,779/262,732.50 = 262,732.50/x
3. Step 3: Cross multiply
   163,779x = 262,732.50 × 262,732.50
4. Step 4: Simplify right side
   163,779x = 69,028,366,556.25
5. Step 5: Solve for x
   x = 69,028,366,556.25/163,779
6. Step 6: Final answer
   x = 421,472.63