Finding the Fourth Proportional to 9,076.54, 13,618.68 and 5,128.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,076.54 : 13,618.68 = 5,128.34 : x
2. Step 2: Convert to fraction form
   9,076.54/13,618.68 = 5,128.34/x
3. Step 3: Cross multiply
   9,076.54x = 13,618.68 × 5,128.34
4. Step 4: Simplify right side
   9,076.54x = 69,841,221.39
5. Step 5: Solve for x
   x = 69,841,221.39/9,076.54
6. Step 6: Final answer
   x = 7,694.70