Finding the Fourth Proportional to 1,643.07, 2,463.37 and 1,058.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.07 : 2,463.37 = 1,058.72 : x
2. Step 2: Convert to fraction form
   1,643.07/2,463.37 = 1,058.72/x
3. Step 3: Cross multiply
   1,643.07x = 2,463.37 × 1,058.72
4. Step 4: Simplify right side
   1,643.07x = 2,608,019.09
5. Step 5: Solve for x
   x = 2,608,019.09/1,643.07
6. Step 6: Final answer
   x = 1,587.28