Finding the Fourth Proportional to 19,142.52, 28,711.49 and 5,103.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,142.52 : 28,711.49 = 5,103.60 : x
2. Step 2: Convert to fraction form
   19,142.52/28,711.49 = 5,103.60/x
3. Step 3: Cross multiply
   19,142.52x = 28,711.49 × 5,103.60
4. Step 4: Simplify right side
   19,142.52x = 146,531,960.36
5. Step 5: Solve for x
   x = 146,531,960.36/19,142.52
6. Step 6: Final answer
   x = 7,654.79