Finding the Third Proportional to 69,471 and 143,856

Step by Step Solution

1. Step 1: Write the proportion equation
   69,471 : 143,856 = 143,856 : x
2. Step 2: Convert to fraction form
   69,471/143,856 = 143,856/x
3. Step 3: Cross multiply
   69,471x = 143,856 × 143,856
4. Step 4: Simplify right side
   69,471x = 20,694,548,736
5. Step 5: Solve for x
   x = 20,694,548,736/69,471
6. Step 6: Final answer
   x = 297,887.59