Finding the Third Proportional to 64,820.50 and 140,706

Step by Step Solution

1. Step 1: Write the proportion equation
   64,820.50 : 140,706 = 140,706 : x
2. Step 2: Convert to fraction form
   64,820.50/140,706 = 140,706/x
3. Step 3: Cross multiply
   64,820.50x = 140,706 × 140,706
4. Step 4: Simplify right side
   64,820.50x = 19,798,178,436
5. Step 5: Solve for x
   x = 19,798,178,436/64,820.50
6. Step 6: Final answer
   x = 305,430.82