Finding the Third Proportional to 111,507 and 237,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,507 : 237,418.50 = 237,418.50 : x
2. Step 2: Convert to fraction form
   111,507/237,418.50 = 237,418.50/x
3. Step 3: Cross multiply
   111,507x = 237,418.50 × 237,418.50
4. Step 4: Simplify right side
   111,507x = 56,367,544,142.25
5. Step 5: Solve for x
   x = 56,367,544,142.25/111,507
6. Step 6: Final answer
   x = 505,506.78