Finding the Third Proportional to 120,721.41 and 262,432.78

Step by Step Solution

1. Step 1: Write the proportion equation
   120,721.41 : 262,432.78 = 262,432.78 : x
2. Step 2: Convert to fraction form
   120,721.41/262,432.78 = 262,432.78/x
3. Step 3: Cross multiply
   120,721.41x = 262,432.78 × 262,432.78
4. Step 4: Simplify right side
   120,721.41x = 68,870,964,674.61
5. Step 5: Solve for x
   x = 68,870,964,674.61/120,721.41
6. Step 6: Final answer
   x = 570,495.05