Finding the Third Proportional to 111,249 and 245,191.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,249 : 245,191.50 = 245,191.50 : x
2. Step 2: Convert to fraction form
   111,249/245,191.50 = 245,191.50/x
3. Step 3: Cross multiply
   111,249x = 245,191.50 × 245,191.50
4. Step 4: Simplify right side
   111,249x = 60,118,871,672.25
5. Step 5: Solve for x
   x = 60,118,871,672.25/111,249
6. Step 6: Final answer
   x = 540,399.21