Finding the Fourth Proportional to 13,789.50, 19,030.50 and 7,821.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,789.50 : 19,030.50 = 7,821.69 : x
2. Step 2: Convert to fraction form
   13,789.50/19,030.50 = 7,821.69/x
3. Step 3: Cross multiply
   13,789.50x = 19,030.50 × 7,821.69
4. Step 4: Simplify right side
   13,789.50x = 148,850,671.55
5. Step 5: Solve for x
   x = 148,850,671.55/13,789.50
6. Step 6: Final answer
   x = 10,794.49