Finding the Third Proportional to 111,157.50 and 243,397.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,157.50 : 243,397.50 = 243,397.50 : x
2. Step 2: Convert to fraction form
   111,157.50/243,397.50 = 243,397.50/x
3. Step 3: Cross multiply
   111,157.50x = 243,397.50 × 243,397.50
4. Step 4: Simplify right side
   111,157.50x = 59,242,343,006.25
5. Step 5: Solve for x
   x = 59,242,343,006.25/111,157.50
6. Step 6: Final answer
   x = 532,958.58