Finding the Third Proportional to 40,890 and 59,988.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,890 : 59,988.50 = 59,988.50 : x
2. Step 2: Convert to fraction form
   40,890/59,988.50 = 59,988.50/x
3. Step 3: Cross multiply
   40,890x = 59,988.50 × 59,988.50
4. Step 4: Simplify right side
   40,890x = 3,598,620,132.25
5. Step 5: Solve for x
   x = 3,598,620,132.25/40,890
6. Step 6: Final answer
   x = 88,007.34