Finding the Fourth Proportional to 1,917.39, 2,644.68 and 1,853.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.39 : 2,644.68 = 1,853.10 : x
2. Step 2: Convert to fraction form
   1,917.39/2,644.68 = 1,853.10/x
3. Step 3: Cross multiply
   1,917.39x = 2,644.68 × 1,853.10
4. Step 4: Simplify right side
   1,917.39x = 4,900,856.51
5. Step 5: Solve for x
   x = 4,900,856.51/1,917.39
6. Step 6: Final answer
   x = 2,556.00