Finding the Third Proportional to 153,900 and 336,240

Step by Step Solution

1. Step 1: Write the proportion equation
   153,900 : 336,240 = 336,240 : x
2. Step 2: Convert to fraction form
   153,900/336,240 = 336,240/x
3. Step 3: Cross multiply
   153,900x = 336,240 × 336,240
4. Step 4: Simplify right side
   153,900x = 113,057,337,600
5. Step 5: Solve for x
   x = 113,057,337,600/153,900
6. Step 6: Final answer
   x = 734,615.58