Finding the Fourth Proportional to 3,111.30, 4,293.75 and 1,853.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.30 : 4,293.75 = 1,853.10 : x
2. Step 2: Convert to fraction form
   3,111.30/4,293.75 = 1,853.10/x
3. Step 3: Cross multiply
   3,111.30x = 4,293.75 × 1,853.10
4. Step 4: Simplify right side
   3,111.30x = 7,956,748.13
5. Step 5: Solve for x
   x = 7,956,748.13/3,111.30
6. Step 6: Final answer
   x = 2,557.37