Finding the Third Proportional to 30,140.44 and 65,638.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,140.44 : 65,638.69 = 65,638.69 : x
2. Step 2: Convert to fraction form
   30,140.44/65,638.69 = 65,638.69/x
3. Step 3: Cross multiply
   30,140.44x = 65,638.69 × 65,638.69
4. Step 4: Simplify right side
   30,140.44x = 4,308,437,296.72
5. Step 5: Solve for x
   x = 4,308,437,296.72/30,140.44
6. Step 6: Final answer
   x = 142,945.41