Finding the Fourth Proportional to 13,280.39, 19,918.27 and 4,960.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.39 : 19,918.27 = 4,960.47 : x
2. Step 2: Convert to fraction form
   13,280.39/19,918.27 = 4,960.47/x
3. Step 3: Cross multiply
   13,280.39x = 19,918.27 × 4,960.47
4. Step 4: Simplify right side
   13,280.39x = 98,804,093.15
5. Step 5: Solve for x
   x = 98,804,093.15/13,280.39
6. Step 6: Final answer
   x = 7,439.85