Finding the Fourth Proportional to 19,131.82, 28,699.38 and 5,280.82

Step by Step Solution

1. Step 1: Write the proportion equation
   19,131.82 : 28,699.38 = 5,280.82 : x
2. Step 2: Convert to fraction form
   19,131.82/28,699.38 = 5,280.82/x
3. Step 3: Cross multiply
   19,131.82x = 28,699.38 × 5,280.82
4. Step 4: Simplify right side
   19,131.82x = 151,556,259.89
5. Step 5: Solve for x
   x = 151,556,259.89/19,131.82
6. Step 6: Final answer
   x = 7,921.69