Finding the Third Proportional to 111,706.50 and 243,069

Step by Step Solution

1. Step 1: Write the proportion equation
   111,706.50 : 243,069 = 243,069 : x
2. Step 2: Convert to fraction form
   111,706.50/243,069 = 243,069/x
3. Step 3: Cross multiply
   111,706.50x = 243,069 × 243,069
4. Step 4: Simplify right side
   111,706.50x = 59,082,538,761
5. Step 5: Solve for x
   x = 59,082,538,761/111,706.50
6. Step 6: Final answer
   x = 528,908.69