Finding the Fourth Proportional to 13,790.14, 19,028.72 and 7,821.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,790.14 : 19,028.72 = 7,821.52 : x
2. Step 2: Convert to fraction form
   13,790.14/19,028.72 = 7,821.52/x
3. Step 3: Cross multiply
   13,790.14x = 19,028.72 × 7,821.52
4. Step 4: Simplify right side
   13,790.14x = 148,833,514.05
5. Step 5: Solve for x
   x = 148,833,514.05/13,790.14
6. Step 6: Final answer
   x = 10,792.75