Finding the Fourth Proportional to 3,638.59, 5,458.61 and 1,173.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.59 : 5,458.61 = 1,173.22 : x
2. Step 2: Convert to fraction form
   3,638.59/5,458.61 = 1,173.22/x
3. Step 3: Cross multiply
   3,638.59x = 5,458.61 × 1,173.22
4. Step 4: Simplify right side
   3,638.59x = 6,404,150.42
5. Step 5: Solve for x
   x = 6,404,150.42/3,638.59
6. Step 6: Final answer
   x = 1,760.06