Finding the Third Proportional to 113,860 and 243,485

Step by Step Solution

1. Step 1: Write the proportion equation
   113,860 : 243,485 = 243,485 : x
2. Step 2: Convert to fraction form
   113,860/243,485 = 243,485/x
3. Step 3: Cross multiply
   113,860x = 243,485 × 243,485
4. Step 4: Simplify right side
   113,860x = 59,284,945,225
5. Step 5: Solve for x
   x = 59,284,945,225/113,860
6. Step 6: Final answer
   x = 520,682.81