Finding the Third Proportional to 4,989 and 7,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,989 : 7,499.50 = 7,499.50 : x
2. Step 2: Convert to fraction form
   4,989/7,499.50 = 7,499.50/x
3. Step 3: Cross multiply
   4,989x = 7,499.50 × 7,499.50
4. Step 4: Simplify right side
   4,989x = 56,242,500.25
5. Step 5: Solve for x
   x = 56,242,500.25/4,989
6. Step 6: Final answer
   x = 11,273.30