Finding the Third Proportional to 118,420 and 243,536

Step by Step Solution

1. Step 1: Write the proportion equation
   118,420 : 243,536 = 243,536 : x
2. Step 2: Convert to fraction form
   118,420/243,536 = 243,536/x
3. Step 3: Cross multiply
   118,420x = 243,536 × 243,536
4. Step 4: Simplify right side
   118,420x = 59,309,783,296
5. Step 5: Solve for x
   x = 59,309,783,296/118,420
6. Step 6: Final answer
   x = 500,842.62