Finding the Fourth Proportional to 9,478.89, 13,078.86 and 5,499.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,478.89 : 13,078.86 = 5,499.49 : x
2. Step 2: Convert to fraction form
   9,478.89/13,078.86 = 5,499.49/x
3. Step 3: Cross multiply
   9,478.89x = 13,078.86 × 5,499.49
4. Step 4: Simplify right side
   9,478.89x = 71,927,059.78
5. Step 5: Solve for x
   x = 71,927,059.78/9,478.89
6. Step 6: Final answer
   x = 7,588.13