Finding the Third Proportional to 31,485.59 and 68,043.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,485.59 : 68,043.80 = 68,043.80 : x
2. Step 2: Convert to fraction form
   31,485.59/68,043.80 = 68,043.80/x
3. Step 3: Cross multiply
   31,485.59x = 68,043.80 × 68,043.80
4. Step 4: Simplify right side
   31,485.59x = 4,629,958,293.17
5. Step 5: Solve for x
   x = 4,629,958,293.17/31,485.59
6. Step 6: Final answer
   x = 147,050.09