Finding the Third Proportional to 70,456 and 153,980

Step by Step Solution

1. Step 1: Write the proportion equation
   70,456 : 153,980 = 153,980 : x
2. Step 2: Convert to fraction form
   70,456/153,980 = 153,980/x
3. Step 3: Cross multiply
   70,456x = 153,980 × 153,980
4. Step 4: Simplify right side
   70,456x = 23,709,840,400
5. Step 5: Solve for x
   x = 23,709,840,400/70,456
6. Step 6: Final answer
   x = 336,519.82