Finding the Third Proportional to 111,985.50 and 243,653.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111,985.50 : 243,653.25 = 243,653.25 : x
2. Step 2: Convert to fraction form
   111,985.50/243,653.25 = 243,653.25/x
3. Step 3: Cross multiply
   111,985.50x = 243,653.25 × 243,653.25
4. Step 4: Simplify right side
   111,985.50x = 59,366,906,235.56
5. Step 5: Solve for x
   x = 59,366,906,235.56/111,985.50
6. Step 6: Final answer
   x = 530,130.30