Finding the Third Proportional to 69,346 and 141,978

Step by Step Solution

1. Step 1: Write the proportion equation
   69,346 : 141,978 = 141,978 : x
2. Step 2: Convert to fraction form
   69,346/141,978 = 141,978/x
3. Step 3: Cross multiply
   69,346x = 141,978 × 141,978
4. Step 4: Simplify right side
   69,346x = 20,157,752,484
5. Step 5: Solve for x
   x = 20,157,752,484/69,346
6. Step 6: Final answer
   x = 290,683.71