Finding the Third Proportional to 111,516 and 245,172

Step by Step Solution

1. Step 1: Write the proportion equation
   111,516 : 245,172 = 245,172 : x
2. Step 2: Convert to fraction form
   111,516/245,172 = 245,172/x
3. Step 3: Cross multiply
   111,516x = 245,172 × 245,172
4. Step 4: Simplify right side
   111,516x = 60,109,309,584
5. Step 5: Solve for x
   x = 60,109,309,584/111,516
6. Step 6: Final answer
   x = 539,019.60