Finding the Third Proportional to 40,259.50 and 87,455.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,259.50 : 87,455.50 = 87,455.50 : x
2. Step 2: Convert to fraction form
   40,259.50/87,455.50 = 87,455.50/x
3. Step 3: Cross multiply
   40,259.50x = 87,455.50 × 87,455.50
4. Step 4: Simplify right side
   40,259.50x = 7,648,464,480.25
5. Step 5: Solve for x
   x = 7,648,464,480.25/40,259.50
6. Step 6: Final answer
   x = 189,979.12