Finding the Fourth Proportional to 3,162.18, 4,742.73 and 1,213.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,162.18 : 4,742.73 = 1,213.86 : x
2. Step 2: Convert to fraction form
   3,162.18/4,742.73 = 1,213.86/x
3. Step 3: Cross multiply
   3,162.18x = 4,742.73 × 1,213.86
4. Step 4: Simplify right side
   3,162.18x = 5,757,010.24
5. Step 5: Solve for x
   x = 5,757,010.24/3,162.18
6. Step 6: Final answer
   x = 1,820.58