Finding the Third Proportional to 109,280 and 238,418

Step by Step Solution

1. Step 1: Write the proportion equation
   109,280 : 238,418 = 238,418 : x
2. Step 2: Convert to fraction form
   109,280/238,418 = 238,418/x
3. Step 3: Cross multiply
   109,280x = 238,418 × 238,418
4. Step 4: Simplify right side
   109,280x = 56,843,142,724
5. Step 5: Solve for x
   x = 56,843,142,724/109,280
6. Step 6: Final answer
   x = 520,160.53