Finding the Fourth Proportional to 201,785.94, 278,466.47 and 111,142.23

Step by Step Solution

1. Step 1: Write the proportion equation
   201,785.94 : 278,466.47 = 111,142.23 : x
2. Step 2: Convert to fraction form
   201,785.94/278,466.47 = 111,142.23/x
3. Step 3: Cross multiply
   201,785.94x = 278,466.47 × 111,142.23
4. Step 4: Simplify right side
   201,785.94x = 30,949,384,456.03
5. Step 5: Solve for x
   x = 30,949,384,456.03/201,785.94
6. Step 6: Final answer
   x = 153,377.31