Finding the Third Proportional to 120,429.75 and 262,311

Step by Step Solution

1. Step 1: Write the proportion equation
   120,429.75 : 262,311 = 262,311 : x
2. Step 2: Convert to fraction form
   120,429.75/262,311 = 262,311/x
3. Step 3: Cross multiply
   120,429.75x = 262,311 × 262,311
4. Step 4: Simplify right side
   120,429.75x = 68,807,060,721
5. Step 5: Solve for x
   x = 68,807,060,721/120,429.75
6. Step 6: Final answer
   x = 571,346.04