Finding the Third Proportional to 120,059.50 and 173,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,059.50 : 173,890.50 = 173,890.50 : x
2. Step 2: Convert to fraction form
   120,059.50/173,890.50 = 173,890.50/x
3. Step 3: Cross multiply
   120,059.50x = 173,890.50 × 173,890.50
4. Step 4: Simplify right side
   120,059.50x = 30,237,905,990.25
5. Step 5: Solve for x
   x = 30,237,905,990.25/120,059.50
6. Step 6: Final answer
   x = 251,857.67