Finding the Fourth Proportional to 12,984.72, 19,485 and 5,192.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,984.72 : 19,485 = 5,192.16 : x
2. Step 2: Convert to fraction form
   12,984.72/19,485 = 5,192.16/x
3. Step 3: Cross multiply
   12,984.72x = 19,485 × 5,192.16
4. Step 4: Simplify right side
   12,984.72x = 101,169,237.60
5. Step 5: Solve for x
   x = 101,169,237.60/12,984.72
6. Step 6: Final answer
   x = 7,791.41