Finding the Fourth Proportional to 1,608.42, 2,221.20 and 1,112.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.42 : 2,221.20 = 1,112.34 : x
2. Step 2: Convert to fraction form
   1,608.42/2,221.20 = 1,112.34/x
3. Step 3: Cross multiply
   1,608.42x = 2,221.20 × 1,112.34
4. Step 4: Simplify right side
   1,608.42x = 2,470,729.61
5. Step 5: Solve for x
   x = 2,470,729.61/1,608.42
6. Step 6: Final answer
   x = 1,536.12