Finding the Third Proportional to 111,577 and 242,840

Step by Step Solution

1. Step 1: Write the proportion equation
   111,577 : 242,840 = 242,840 : x
2. Step 2: Convert to fraction form
   111,577/242,840 = 242,840/x
3. Step 3: Cross multiply
   111,577x = 242,840 × 242,840
4. Step 4: Simplify right side
   111,577x = 58,971,265,600
5. Step 5: Solve for x
   x = 58,971,265,600/111,577
6. Step 6: Final answer
   x = 528,525.28