Finding the Third Proportional to 121,861.69 and 262,990.69

Step by Step Solution

1. Step 1: Write the proportion equation
   121,861.69 : 262,990.69 = 262,990.69 : x
2. Step 2: Convert to fraction form
   121,861.69/262,990.69 = 262,990.69/x
3. Step 3: Cross multiply
   121,861.69x = 262,990.69 × 262,990.69
4. Step 4: Simplify right side
   121,861.69x = 69,164,101,711.72
5. Step 5: Solve for x
   x = 69,164,101,711.72/121,861.69
6. Step 6: Final answer
   x = 567,562.32