Finding the Fourth Proportional to 12,680.12, 19,022.24 and 3,913

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.12 : 19,022.24 = 3,913 : x
2. Step 2: Convert to fraction form
   12,680.12/19,022.24 = 3,913/x
3. Step 3: Cross multiply
   12,680.12x = 19,022.24 × 3,913
4. Step 4: Simplify right side
   12,680.12x = 74,434,025.12
5. Step 5: Solve for x
   x = 74,434,025.12/12,680.12
6. Step 6: Final answer
   x = 5,870.14