Finding the Third Proportional to 33,278.72 and 72,388.31

Step by Step Solution

1. Step 1: Write the proportion equation
   33,278.72 : 72,388.31 = 72,388.31 : x
2. Step 2: Convert to fraction form
   33,278.72/72,388.31 = 72,388.31/x
3. Step 3: Cross multiply
   33,278.72x = 72,388.31 × 72,388.31
4. Step 4: Simplify right side
   33,278.72x = 5,240,067,786.60
5. Step 5: Solve for x
   x = 5,240,067,786.60/33,278.72
6. Step 6: Final answer
   x = 157,460.02