Finding the Third Proportional to 64,720.69 and 87,442.03

Step by Step Solution

1. Step 1: Write the proportion equation
   64,720.69 : 87,442.03 = 87,442.03 : x
2. Step 2: Convert to fraction form
   64,720.69/87,442.03 = 87,442.03/x
3. Step 3: Cross multiply
   64,720.69x = 87,442.03 × 87,442.03
4. Step 4: Simplify right side
   64,720.69x = 7,646,108,829.13
5. Step 5: Solve for x
   x = 7,646,108,829.13/64,720.69
6. Step 6: Final answer
   x = 118,140.11