Finding the Fourth Proportional to 3,636.72, 5,455.56 and 1,039.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,636.72 : 5,455.56 = 1,039.76 : x
2. Step 2: Convert to fraction form
   3,636.72/5,455.56 = 1,039.76/x
3. Step 3: Cross multiply
   3,636.72x = 5,455.56 × 1,039.76
4. Step 4: Simplify right side
   3,636.72x = 5,672,473.07
5. Step 5: Solve for x
   x = 5,672,473.07/3,636.72
6. Step 6: Final answer
   x = 1,559.78