Finding the Fourth Proportional to 200,909, 277,267.38 and 111,485

Step by Step Solution

1. Step 1: Write the proportion equation
   200,909 : 277,267.38 = 111,485 : x
2. Step 2: Convert to fraction form
   200,909/277,267.38 = 111,485/x
3. Step 3: Cross multiply
   200,909x = 277,267.38 × 111,485
4. Step 4: Simplify right side
   200,909x = 30,911,153,859.30
5. Step 5: Solve for x
   x = 30,911,153,859.30/200,909
6. Step 6: Final answer
   x = 153,856.49