Finding the Fourth Proportional to 3,651.64, 5,478.27 and 1,054.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,651.64 : 5,478.27 = 1,054.38 : x
2. Step 2: Convert to fraction form
   3,651.64/5,478.27 = 1,054.38/x
3. Step 3: Cross multiply
   3,651.64x = 5,478.27 × 1,054.38
4. Step 4: Simplify right side
   3,651.64x = 5,776,178.32
5. Step 5: Solve for x
   x = 5,776,178.32/3,651.64
6. Step 6: Final answer
   x = 1,581.80