Finding the Third Proportional to 111,178 and 243,118

Step by Step Solution

1. Step 1: Write the proportion equation
   111,178 : 243,118 = 243,118 : x
2. Step 2: Convert to fraction form
   111,178/243,118 = 243,118/x
3. Step 3: Cross multiply
   111,178x = 243,118 × 243,118
4. Step 4: Simplify right side
   111,178x = 59,106,361,924
5. Step 5: Solve for x
   x = 59,106,361,924/111,178
6. Step 6: Final answer
   x = 531,637.21