Finding the Third Proportional to 68,904 and 140,730

Step by Step Solution

1. Step 1: Write the proportion equation
   68,904 : 140,730 = 140,730 : x
2. Step 2: Convert to fraction form
   68,904/140,730 = 140,730/x
3. Step 3: Cross multiply
   68,904x = 140,730 × 140,730
4. Step 4: Simplify right side
   68,904x = 19,804,932,900
5. Step 5: Solve for x
   x = 19,804,932,900/68,904
6. Step 6: Final answer
   x = 287,427.91