Finding the Third Proportional to 31,279.50 and 68,148

Step by Step Solution

1. Step 1: Write the proportion equation
   31,279.50 : 68,148 = 68,148 : x
2. Step 2: Convert to fraction form
   31,279.50/68,148 = 68,148/x
3. Step 3: Cross multiply
   31,279.50x = 68,148 × 68,148
4. Step 4: Simplify right side
   31,279.50x = 4,644,149,904
5. Step 5: Solve for x
   x = 4,644,149,904/31,279.50
6. Step 6: Final answer
   x = 148,472.64