Finding the Third Proportional to 111,748.50 and 243,445.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111,748.50 : 243,445.78 = 243,445.78 : x
2. Step 2: Convert to fraction form
   111,748.50/243,445.78 = 243,445.78/x
3. Step 3: Cross multiply
   111,748.50x = 243,445.78 × 243,445.78
4. Step 4: Simplify right side
   111,748.50x = 59,265,848,408.42
5. Step 5: Solve for x
   x = 59,265,848,408.42/111,748.50
6. Step 6: Final answer
   x = 530,350.28