Finding the Third Proportional to 67,720 and 103,090

Step by Step Solution

1. Step 1: Write the proportion equation
   67,720 : 103,090 = 103,090 : x
2. Step 2: Convert to fraction form
   67,720/103,090 = 103,090/x
3. Step 3: Cross multiply
   67,720x = 103,090 × 103,090
4. Step 4: Simplify right side
   67,720x = 10,627,548,100
5. Step 5: Solve for x
   x = 10,627,548,100/67,720
6. Step 6: Final answer
   x = 156,933.67