Finding the Third Proportional to 111,400 and 240,558

Step by Step Solution

1. Step 1: Write the proportion equation
   111,400 : 240,558 = 240,558 : x
2. Step 2: Convert to fraction form
   111,400/240,558 = 240,558/x
3. Step 3: Cross multiply
   111,400x = 240,558 × 240,558
4. Step 4: Simplify right side
   111,400x = 57,868,151,364
5. Step 5: Solve for x
   x = 57,868,151,364/111,400
6. Step 6: Final answer
   x = 519,462.76