Finding the Third Proportional to 119,989.69 and 259,221.94

Step by Step Solution

1. Step 1: Write the proportion equation
   119,989.69 : 259,221.94 = 259,221.94 : x
2. Step 2: Convert to fraction form
   119,989.69/259,221.94 = 259,221.94/x
3. Step 3: Cross multiply
   119,989.69x = 259,221.94 × 259,221.94
4. Step 4: Simplify right side
   119,989.69x = 67,196,012,881.25
5. Step 5: Solve for x
   x = 67,196,012,881.25/119,989.69
6. Step 6: Final answer
   x = 560,014.90