Finding the Fourth Proportional to 3,111.15, 4,292.48 and 1,851.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.15 : 4,292.48 = 1,851.58 : x
2. Step 2: Convert to fraction form
   3,111.15/4,292.48 = 1,851.58/x
3. Step 3: Cross multiply
   3,111.15x = 4,292.48 × 1,851.58
4. Step 4: Simplify right side
   3,111.15x = 7,947,845.55
5. Step 5: Solve for x
   x = 7,947,845.55/3,111.15
6. Step 6: Final answer
   x = 2,554.63