Finding the Third Proportional to 111,480 and 243,276

Step by Step Solution

1. Step 1: Write the proportion equation
   111,480 : 243,276 = 243,276 : x
2. Step 2: Convert to fraction form
   111,480/243,276 = 243,276/x
3. Step 3: Cross multiply
   111,480x = 243,276 × 243,276
4. Step 4: Simplify right side
   111,480x = 59,183,212,176
5. Step 5: Solve for x
   x = 59,183,212,176/111,480
6. Step 6: Final answer
   x = 530,886.37