Finding the Fourth Proportional to 13,147.30, 19,728.76 and 5,253.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.30 : 19,728.76 = 5,253.54 : x
2. Step 2: Convert to fraction form
   13,147.30/19,728.76 = 5,253.54/x
3. Step 3: Cross multiply
   13,147.30x = 19,728.76 × 5,253.54
4. Step 4: Simplify right side
   13,147.30x = 103,645,848.74
5. Step 5: Solve for x
   x = 103,645,848.74/13,147.30
6. Step 6: Final answer
   x = 7,883.43