Finding the Third Proportional to 111,911.50 and 243,488

Step by Step Solution

1. Step 1: Write the proportion equation
   111,911.50 : 243,488 = 243,488 : x
2. Step 2: Convert to fraction form
   111,911.50/243,488 = 243,488/x
3. Step 3: Cross multiply
   111,911.50x = 243,488 × 243,488
4. Step 4: Simplify right side
   111,911.50x = 59,286,406,144
5. Step 5: Solve for x
   x = 59,286,406,144/111,911.50
6. Step 6: Final answer
   x = 529,761.52