Finding the Fourth Proportional to 200,839.50, 277,158.51 and 111,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,839.50 : 277,158.51 = 111,415.50 : x
2. Step 2: Convert to fraction form
   200,839.50/277,158.51 = 111,415.50/x
3. Step 3: Cross multiply
   200,839.50x = 277,158.51 × 111,415.50
4. Step 4: Simplify right side
   200,839.50x = 30,879,753,970.91
5. Step 5: Solve for x
   x = 30,879,753,970.91/200,839.50
6. Step 6: Final answer
   x = 153,753.39