Finding the Fourth Proportional to 12,677.16, 19,014.12 and 5,280.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,677.16 : 19,014.12 = 5,280.24 : x
2. Step 2: Convert to fraction form
   12,677.16/19,014.12 = 5,280.24/x
3. Step 3: Cross multiply
   12,677.16x = 19,014.12 × 5,280.24
4. Step 4: Simplify right side
   12,677.16x = 100,399,116.99
5. Step 5: Solve for x
   x = 100,399,116.99/12,677.16
6. Step 6: Final answer
   x = 7,919.69