Finding the Third Proportional to 69,321.38 and 141,921

Step by Step Solution

1. Step 1: Write the proportion equation
   69,321.38 : 141,921 = 141,921 : x
2. Step 2: Convert to fraction form
   69,321.38/141,921 = 141,921/x
3. Step 3: Cross multiply
   69,321.38x = 141,921 × 141,921
4. Step 4: Simplify right side
   69,321.38x = 20,141,570,241
5. Step 5: Solve for x
   x = 20,141,570,241/69,321.38
6. Step 6: Final answer
   x = 290,553.53