Finding the Third Proportional to 218,250 and 336,384

Step by Step Solution

1. Step 1: Write the proportion equation
   218,250 : 336,384 = 336,384 : x
2. Step 2: Convert to fraction form
   218,250/336,384 = 336,384/x
3. Step 3: Cross multiply
   218,250x = 336,384 × 336,384
4. Step 4: Simplify right side
   218,250x = 113,154,195,456
5. Step 5: Solve for x
   x = 113,154,195,456/218,250
6. Step 6: Final answer
   x = 518,461.38