Finding the Fourth Proportional to 201,849, 278,540.56 and 111,187.20

Step by Step Solution

1. Step 1: Write the proportion equation
   201,849 : 278,540.56 = 111,187.20 : x
2. Step 2: Convert to fraction form
   201,849/278,540.56 = 111,187.20/x
3. Step 3: Cross multiply
   201,849x = 278,540.56 × 111,187.20
4. Step 4: Simplify right side
   201,849x = 30,970,144,952.83
5. Step 5: Solve for x
   x = 30,970,144,952.83/201,849
6. Step 6: Final answer
   x = 153,432.24