Finding the Fourth Proportional to 11,355.84, 17,040.24 and 4,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,355.84 : 17,040.24 = 4,428.72 : x
2. Step 2: Convert to fraction form
   11,355.84/17,040.24 = 4,428.72/x
3. Step 3: Cross multiply
   11,355.84x = 17,040.24 × 4,428.72
4. Step 4: Simplify right side
   11,355.84x = 75,466,451.69
5. Step 5: Solve for x
   x = 75,466,451.69/11,355.84
6. Step 6: Final answer
   x = 6,645.61