Finding the Fourth Proportional to 2,212.37, 3,053.21 and 1,315.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.37 : 3,053.21 = 1,315.86 : x
2. Step 2: Convert to fraction form
   2,212.37/3,053.21 = 1,315.86/x
3. Step 3: Cross multiply
   2,212.37x = 3,053.21 × 1,315.86
4. Step 4: Simplify right side
   2,212.37x = 4,017,590.33
5. Step 5: Solve for x
   x = 4,017,590.33/2,212.37
6. Step 6: Final answer
   x = 1,815.97