Finding the Third Proportional to 111,726 and 243,108

Step by Step Solution

1. Step 1: Write the proportion equation
   111,726 : 243,108 = 243,108 : x
2. Step 2: Convert to fraction form
   111,726/243,108 = 243,108/x
3. Step 3: Cross multiply
   111,726x = 243,108 × 243,108
4. Step 4: Simplify right side
   111,726x = 59,101,499,664
5. Step 5: Solve for x
   x = 59,101,499,664/111,726
6. Step 6: Final answer
   x = 528,986.09