Finding the Fourth Proportional to 2,058.31, 2,840.51 and 1,161.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058.31 : 2,840.51 = 1,161.88 : x
2. Step 2: Convert to fraction form
   2,058.31/2,840.51 = 1,161.88/x
3. Step 3: Cross multiply
   2,058.31x = 2,840.51 × 1,161.88
4. Step 4: Simplify right side
   2,058.31x = 3,300,338.73
5. Step 5: Solve for x
   x = 3,300,338.73/2,058.31
6. Step 6: Final answer
   x = 1,603.42