Finding the Third Proportional to 111,408.75 and 243,870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   111,408.75 : 243,870.75 = 243,870.75 : x
2. Step 2: Convert to fraction form
   111,408.75/243,870.75 = 243,870.75/x
3. Step 3: Cross multiply
   111,408.75x = 243,870.75 × 243,870.75
4. Step 4: Simplify right side
   111,408.75x = 59,472,942,705.56
5. Step 5: Solve for x
   x = 59,472,942,705.56/111,408.75
6. Step 6: Final answer
   x = 533,826.50