Finding the Third Proportional to 31,040 and 45,600

Step by Step Solution

1. Step 1: Write the proportion equation
   31,040 : 45,600 = 45,600 : x
2. Step 2: Convert to fraction form
   31,040/45,600 = 45,600/x
3. Step 3: Cross multiply
   31,040x = 45,600 × 45,600
4. Step 4: Simplify right side
   31,040x = 2,079,360,000
5. Step 5: Solve for x
   x = 2,079,360,000/31,040
6. Step 6: Final answer
   x = 66,989.69