Finding the Third Proportional to 17,868.50 and 40,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,868.50 : 40,290.50 = 40,290.50 : x
2. Step 2: Convert to fraction form
   17,868.50/40,290.50 = 40,290.50/x
3. Step 3: Cross multiply
   17,868.50x = 40,290.50 × 40,290.50
4. Step 4: Simplify right side
   17,868.50x = 1,623,324,390.25
5. Step 5: Solve for x
   x = 1,623,324,390.25/17,868.50
6. Step 6: Final answer
   x = 90,848.39