Finding the Fourth Proportional to 6,667.40, 9,201.20 and 3,642.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,667.40 : 9,201.20 = 3,642.72 : x
2. Step 2: Convert to fraction form
   6,667.40/9,201.20 = 3,642.72/x
3. Step 3: Cross multiply
   6,667.40x = 9,201.20 × 3,642.72
4. Step 4: Simplify right side
   6,667.40x = 33,517,395.26
5. Step 5: Solve for x
   x = 33,517,395.26/6,667.40
6. Step 6: Final answer
   x = 5,027.06