Finding the Fourth Proportional to 12,900.38, 19,351 and 4,581.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900.38 : 19,351 = 4,581.05 : x
2. Step 2: Convert to fraction form
   12,900.38/19,351 = 4,581.05/x
3. Step 3: Cross multiply
   12,900.38x = 19,351 × 4,581.05
4. Step 4: Simplify right side
   12,900.38x = 88,647,898.55
5. Step 5: Solve for x
   x = 88,647,898.55/12,900.38
6. Step 6: Final answer
   x = 6,871.73