Finding the Third Proportional to 69,478 and 141,412

Step by Step Solution

1. Step 1: Write the proportion equation
   69,478 : 141,412 = 141,412 : x
2. Step 2: Convert to fraction form
   69,478/141,412 = 141,412/x
3. Step 3: Cross multiply
   69,478x = 141,412 × 141,412
4. Step 4: Simplify right side
   69,478x = 19,997,353,744
5. Step 5: Solve for x
   x = 19,997,353,744/69,478
6. Step 6: Final answer
   x = 287,822.82