Finding the Third Proportional to 111,272 and 247,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,272 : 247,421.50 = 247,421.50 : x
2. Step 2: Convert to fraction form
   111,272/247,421.50 = 247,421.50/x
3. Step 3: Cross multiply
   111,272x = 247,421.50 × 247,421.50
4. Step 4: Simplify right side
   111,272x = 61,217,398,662.25
5. Step 5: Solve for x
   x = 61,217,398,662.25/111,272
6. Step 6: Final answer
   x = 550,159.96