Finding the Third Proportional to 31,012.88 and 67,645.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.88 : 67,645.13 = 67,645.13 : x
2. Step 2: Convert to fraction form
   31,012.88/67,645.13 = 67,645.13/x
3. Step 3: Cross multiply
   31,012.88x = 67,645.13 × 67,645.13
4. Step 4: Simplify right side
   31,012.88x = 4,575,862,936.27
5. Step 5: Solve for x
   x = 4,575,862,936.27/31,012.88
6. Step 6: Final answer
   x = 147,547.20