Finding the Third Proportional to 31,259.81 and 68,259.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,259.81 : 68,259.94 = 68,259.94 : x
2. Step 2: Convert to fraction form
   31,259.81/68,259.94 = 68,259.94/x
3. Step 3: Cross multiply
   31,259.81x = 68,259.94 × 68,259.94
4. Step 4: Simplify right side
   31,259.81x = 4,659,419,067.50
5. Step 5: Solve for x
   x = 4,659,419,067.50/31,259.81
6. Step 6: Final answer
   x = 149,054.61