Finding the Third Proportional to 111,667.50 and 243,417

Step by Step Solution

1. Step 1: Write the proportion equation
   111,667.50 : 243,417 = 243,417 : x
2. Step 2: Convert to fraction form
   111,667.50/243,417 = 243,417/x
3. Step 3: Cross multiply
   111,667.50x = 243,417 × 243,417
4. Step 4: Simplify right side
   111,667.50x = 59,251,835,889
5. Step 5: Solve for x
   x = 59,251,835,889/111,667.50
6. Step 6: Final answer
   x = 530,609.50