Finding the Fourth Proportional to 13,789.98, 19,029.87 and 7,821.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,789.98 : 19,029.87 = 7,821.54 : x
2. Step 2: Convert to fraction form
   13,789.98/19,029.87 = 7,821.54/x
3. Step 3: Cross multiply
   13,789.98x = 19,029.87 × 7,821.54
4. Step 4: Simplify right side
   13,789.98x = 148,842,889.40
5. Step 5: Solve for x
   x = 148,842,889.40/13,789.98
6. Step 6: Final answer
   x = 10,793.55