Finding the Third Proportional to 64,964 and 140,290

Step by Step Solution

1. Step 1: Write the proportion equation
   64,964 : 140,290 = 140,290 : x
2. Step 2: Convert to fraction form
   64,964/140,290 = 140,290/x
3. Step 3: Cross multiply
   64,964x = 140,290 × 140,290
4. Step 4: Simplify right side
   64,964x = 19,681,284,100
5. Step 5: Solve for x
   x = 19,681,284,100/64,964
6. Step 6: Final answer
   x = 302,956.78