Finding the Fourth Proportional to 3,651.76, 5,478.18 and 1,054.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,651.76 : 5,478.18 = 1,054.72 : x
2. Step 2: Convert to fraction form
   3,651.76/5,478.18 = 1,054.72/x
3. Step 3: Cross multiply
   3,651.76x = 5,478.18 × 1,054.72
4. Step 4: Simplify right side
   3,651.76x = 5,777,946.01
5. Step 5: Solve for x
   x = 5,777,946.01/3,651.76
6. Step 6: Final answer
   x = 1,582.24