Finding the Fourth Proportional to 2,212.94, 3,317.51 and 1,057.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.94 : 3,317.51 = 1,057.88 : x
2. Step 2: Convert to fraction form
   2,212.94/3,317.51 = 1,057.88/x
3. Step 3: Cross multiply
   2,212.94x = 3,317.51 × 1,057.88
4. Step 4: Simplify right side
   2,212.94x = 3,509,505.60
5. Step 5: Solve for x
   x = 3,509,505.60/2,212.94
6. Step 6: Final answer
   x = 1,585.91