Finding the Fourth Proportional to 3,637.58, 5,457.18 and 1,040.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,637.58 : 5,457.18 = 1,040.72 : x
2. Step 2: Convert to fraction form
   3,637.58/5,457.18 = 1,040.72/x
3. Step 3: Cross multiply
   3,637.58x = 5,457.18 × 1,040.72
4. Step 4: Simplify right side
   3,637.58x = 5,679,396.37
5. Step 5: Solve for x
   x = 5,679,396.37/3,637.58
6. Step 6: Final answer
   x = 1,561.31