Finding the Fourth Proportional to 201,808.60, 278,498.18 and 111,162.71

Step by Step Solution

1. Step 1: Write the proportion equation
   201,808.60 : 278,498.18 = 111,162.71 : x
2. Step 2: Convert to fraction form
   201,808.60/278,498.18 = 111,162.71/x
3. Step 3: Cross multiply
   201,808.60x = 278,498.18 × 111,162.71
4. Step 4: Simplify right side
   201,808.60x = 30,958,613,393.02
5. Step 5: Solve for x
   x = 30,958,613,393.02/201,808.60
6. Step 6: Final answer
   x = 153,405.82