Finding the Third Proportional to 31,498.50 and 68,079.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,498.50 : 68,079.75 = 68,079.75 : x
2. Step 2: Convert to fraction form
   31,498.50/68,079.75 = 68,079.75/x
3. Step 3: Cross multiply
   31,498.50x = 68,079.75 × 68,079.75
4. Step 4: Simplify right side
   31,498.50x = 4,634,852,360.06
5. Step 5: Solve for x
   x = 4,634,852,360.06/31,498.50
6. Step 6: Final answer
   x = 147,145.18