Finding the Fourth Proportional to 201,853.55, 278,556.59 and 111,207.42

Step by Step Solution

1. Step 1: Write the proportion equation
   201,853.55 : 278,556.59 = 111,207.42 : x
2. Step 2: Convert to fraction form
   201,853.55/278,556.59 = 111,207.42/x
3. Step 3: Cross multiply
   201,853.55x = 278,556.59 × 111,207.42
4. Step 4: Simplify right side
   201,853.55x = 30,977,559,141.86
5. Step 5: Solve for x
   x = 30,977,559,141.86/201,853.55
6. Step 6: Final answer
   x = 153,465.52