Finding the Third Proportional to 31,429.13 and 67,070.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,429.13 : 67,070.25 = 67,070.25 : x
2. Step 2: Convert to fraction form
   31,429.13/67,070.25 = 67,070.25/x
3. Step 3: Cross multiply
   31,429.13x = 67,070.25 × 67,070.25
4. Step 4: Simplify right side
   31,429.13x = 4,498,418,435.06
5. Step 5: Solve for x
   x = 4,498,418,435.06/31,429.13
6. Step 6: Final answer
   x = 143,128.97