Finding the Third Proportional to 111,507 and 245,154

Step by Step Solution

1. Step 1: Write the proportion equation
   111,507 : 245,154 = 245,154 : x
2. Step 2: Convert to fraction form
   111,507/245,154 = 245,154/x
3. Step 3: Cross multiply
   111,507x = 245,154 × 245,154
4. Step 4: Simplify right side
   111,507x = 60,100,483,716
5. Step 5: Solve for x
   x = 60,100,483,716/111,507
6. Step 6: Final answer
   x = 538,983.95