Finding the Fourth Proportional to 12,880.05, 19,321.89 and 4,113.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,880.05 : 19,321.89 = 4,113.01 : x
2. Step 2: Convert to fraction form
   12,880.05/19,321.89 = 4,113.01/x
3. Step 3: Cross multiply
   12,880.05x = 19,321.89 × 4,113.01
4. Step 4: Simplify right side
   12,880.05x = 79,471,126.79
5. Step 5: Solve for x
   x = 79,471,126.79/12,880.05
6. Step 6: Final answer
   x = 6,170.09