Finding the Third Proportional to 40,787.50 and 90,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,787.50 : 90,309.50 = 90,309.50 : x
2. Step 2: Convert to fraction form
   40,787.50/90,309.50 = 90,309.50/x
3. Step 3: Cross multiply
   40,787.50x = 90,309.50 × 90,309.50
4. Step 4: Simplify right side
   40,787.50x = 8,155,805,790.25
5. Step 5: Solve for x
   x = 8,155,805,790.25/40,787.50
6. Step 6: Final answer
   x = 199,958.46