Finding the Fourth Proportional to 12,858.76, 19,290.72 and 5,463.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,858.76 : 19,290.72 = 5,463.16 : x
2. Step 2: Convert to fraction form
   12,858.76/19,290.72 = 5,463.16/x
3. Step 3: Cross multiply
   12,858.76x = 19,290.72 × 5,463.16
4. Step 4: Simplify right side
   12,858.76x = 105,388,289.88
5. Step 5: Solve for x
   x = 105,388,289.88/12,858.76
6. Step 6: Final answer
   x = 8,195.84