Finding the Fourth Proportional to 201,784.31, 278,464.22 and 111,143.49

Step by Step Solution

1. Step 1: Write the proportion equation
   201,784.31 : 278,464.22 = 111,143.49 : x
2. Step 2: Convert to fraction form
   201,784.31/278,464.22 = 111,143.49/x
3. Step 3: Cross multiply
   201,784.31x = 278,464.22 × 111,143.49
4. Step 4: Simplify right side
   201,784.31x = 30,949,485,250.93
5. Step 5: Solve for x
   x = 30,949,485,250.93/201,784.31
6. Step 6: Final answer
   x = 153,379.05