Finding the Fourth Proportional to 12,975.06, 19,469.98 and 5,078.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,975.06 : 19,469.98 = 5,078.21 : x
2. Step 2: Convert to fraction form
   12,975.06/19,469.98 = 5,078.21/x
3. Step 3: Cross multiply
   12,975.06x = 19,469.98 × 5,078.21
4. Step 4: Simplify right side
   12,975.06x = 98,872,647.14
5. Step 5: Solve for x
   x = 98,872,647.14/12,975.06
6. Step 6: Final answer
   x = 7,620.21