Finding the Third Proportional to 111,558.50 and 169,951.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,558.50 : 169,951.50 = 169,951.50 : x
2. Step 2: Convert to fraction form
   111,558.50/169,951.50 = 169,951.50/x
3. Step 3: Cross multiply
   111,558.50x = 169,951.50 × 169,951.50
4. Step 4: Simplify right side
   111,558.50x = 28,883,512,352.25
5. Step 5: Solve for x
   x = 28,883,512,352.25/111,558.50
6. Step 6: Final answer
   x = 258,909.11