Finding the Third Proportional to 111,680 and 243,057

Step by Step Solution

1. Step 1: Write the proportion equation
   111,680 : 243,057 = 243,057 : x
2. Step 2: Convert to fraction form
   111,680/243,057 = 243,057/x
3. Step 3: Cross multiply
   111,680x = 243,057 × 243,057
4. Step 4: Simplify right side
   111,680x = 59,076,705,249
5. Step 5: Solve for x
   x = 59,076,705,249/111,680
6. Step 6: Final answer
   x = 528,981.96