Finding the Third Proportional to 31,328 and 65,888

Step by Step Solution

1. Step 1: Write the proportion equation
   31,328 : 65,888 = 65,888 : x
2. Step 2: Convert to fraction form
   31,328/65,888 = 65,888/x
3. Step 3: Cross multiply
   31,328x = 65,888 × 65,888
4. Step 4: Simplify right side
   31,328x = 4,341,228,544
5. Step 5: Solve for x
   x = 4,341,228,544/31,328
6. Step 6: Final answer
   x = 138,573.43