Finding the Third Proportional to 171,915 and 262,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   171,915 : 262,813.50 = 262,813.50 : x
2. Step 2: Convert to fraction form
   171,915/262,813.50 = 262,813.50/x
3. Step 3: Cross multiply
   171,915x = 262,813.50 × 262,813.50
4. Step 4: Simplify right side
   171,915x = 69,070,935,782.25
5. Step 5: Solve for x
   x = 69,070,935,782.25/171,915
6. Step 6: Final answer
   x = 401,773.76