Finding the Third Proportional to 64,288.69 and 140,454

Step by Step Solution

1. Step 1: Write the proportion equation
   64,288.69 : 140,454 = 140,454 : x
2. Step 2: Convert to fraction form
   64,288.69/140,454 = 140,454/x
3. Step 3: Cross multiply
   64,288.69x = 140,454 × 140,454
4. Step 4: Simplify right side
   64,288.69x = 19,727,326,116
5. Step 5: Solve for x
   x = 19,727,326,116/64,288.69
6. Step 6: Final answer
   x = 306,855.33