Finding the Fourth Proportional to 3,635.58, 5,454.18 and 1,038.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,635.58 : 5,454.18 = 1,038.72 : x
2. Step 2: Convert to fraction form
   3,635.58/5,454.18 = 1,038.72/x
3. Step 3: Cross multiply
   3,635.58x = 5,454.18 × 1,038.72
4. Step 4: Simplify right side
   3,635.58x = 5,665,365.85
5. Step 5: Solve for x
   x = 5,665,365.85/3,635.58
6. Step 6: Final answer
   x = 1,558.31