Finding the Third Proportional to 69,486.75 and 141,426

Step by Step Solution

1. Step 1: Write the proportion equation
   69,486.75 : 141,426 = 141,426 : x
2. Step 2: Convert to fraction form
   69,486.75/141,426 = 141,426/x
3. Step 3: Cross multiply
   69,486.75x = 141,426 × 141,426
4. Step 4: Simplify right side
   69,486.75x = 20,001,313,476
5. Step 5: Solve for x
   x = 20,001,313,476/69,486.75
6. Step 6: Final answer
   x = 287,843.56