Finding the Fourth Proportional to 13,034.58, 17,986.56 and 7,728.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,034.58 : 17,986.56 = 7,728.54 : x
2. Step 2: Convert to fraction form
   13,034.58/17,986.56 = 7,728.54/x
3. Step 3: Cross multiply
   13,034.58x = 17,986.56 × 7,728.54
4. Step 4: Simplify right side
   13,034.58x = 139,009,848.42
5. Step 5: Solve for x
   x = 139,009,848.42/13,034.58
6. Step 6: Final answer
   x = 10,664.70