Finding the Fourth Proportional to 15,846.69, 21,870.72 and 9,131.03

Step by Step Solution

1. Step 1: Write the proportion equation
   15,846.69 : 21,870.72 = 9,131.03 : x
2. Step 2: Convert to fraction form
   15,846.69/21,870.72 = 9,131.03/x
3. Step 3: Cross multiply
   15,846.69x = 21,870.72 × 9,131.03
4. Step 4: Simplify right side
   15,846.69x = 199,702,200.44
5. Step 5: Solve for x
   x = 199,702,200.44/15,846.69
6. Step 6: Final answer
   x = 12,602.14