Finding the Fourth Proportional to 200,728.50, 277,005.33 and 111,304.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,728.50 : 277,005.33 = 111,304.50 : x
2. Step 2: Convert to fraction form
   200,728.50/277,005.33 = 111,304.50/x
3. Step 3: Cross multiply
   200,728.50x = 277,005.33 × 111,304.50
4. Step 4: Simplify right side
   200,728.50x = 30,831,939,752.99
5. Step 5: Solve for x
   x = 30,831,939,752.99/200,728.50
6. Step 6: Final answer
   x = 153,600.21