Finding the Fourth Proportional to 5,322.56, 7,980.38 and 2,201.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,322.56 : 7,980.38 = 2,201.72 : x
2. Step 2: Convert to fraction form
   5,322.56/7,980.38 = 2,201.72/x
3. Step 3: Cross multiply
   5,322.56x = 7,980.38 × 2,201.72
4. Step 4: Simplify right side
   5,322.56x = 17,570,562.25
5. Step 5: Solve for x
   x = 17,570,562.25/5,322.56
6. Step 6: Final answer
   x = 3,301.15