Finding the Third Proportional to 40,687 and 60,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,687 : 60,990.50 = 60,990.50 : x
2. Step 2: Convert to fraction form
   40,687/60,990.50 = 60,990.50/x
3. Step 3: Cross multiply
   40,687x = 60,990.50 × 60,990.50
4. Step 4: Simplify right side
   40,687x = 3,719,841,090.25
5. Step 5: Solve for x
   x = 3,719,841,090.25/40,687
6. Step 6: Final answer
   x = 91,425.79