Finding the Fourth Proportional to 3,665.36, 5,457.92 and 3,612.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.36 : 5,457.92 = 3,612.98 : x
2. Step 2: Convert to fraction form
   3,665.36/5,457.92 = 3,612.98/x
3. Step 3: Cross multiply
   3,665.36x = 5,457.92 × 3,612.98
4. Step 4: Simplify right side
   3,665.36x = 19,719,355.80
5. Step 5: Solve for x
   x = 19,719,355.80/3,665.36
6. Step 6: Final answer
   x = 5,379.92