Finding the Fourth Proportional to 2,518.72, 3,777.60 and 1,058.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.72 : 3,777.60 = 1,058.56 : x
2. Step 2: Convert to fraction form
   2,518.72/3,777.60 = 1,058.56/x
3. Step 3: Cross multiply
   2,518.72x = 3,777.60 × 1,058.56
4. Step 4: Simplify right side
   2,518.72x = 3,998,816.26
5. Step 5: Solve for x
   x = 3,998,816.26/2,518.72
6. Step 6: Final answer
   x = 1,587.64