Finding the Fourth Proportional to 1,854.78, 2,559.88 and 1,058.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,854.78 : 2,559.88 = 1,058.10 : x
2. Step 2: Convert to fraction form
   1,854.78/2,559.88 = 1,058.10/x
3. Step 3: Cross multiply
   1,854.78x = 2,559.88 × 1,058.10
4. Step 4: Simplify right side
   1,854.78x = 2,708,606.38
5. Step 5: Solve for x
   x = 2,708,606.38/1,854.78
6. Step 6: Final answer
   x = 1,460.34