Finding the Fourth Proportional to 12,398.42, 18,581.81 and 5,810.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,398.42 : 18,581.81 = 5,810.09 : x
2. Step 2: Convert to fraction form
   12,398.42/18,581.81 = 5,810.09/x
3. Step 3: Cross multiply
   12,398.42x = 18,581.81 × 5,810.09
4. Step 4: Simplify right side
   12,398.42x = 107,961,866.50
5. Step 5: Solve for x
   x = 107,961,866.50/12,398.42
6. Step 6: Final answer
   x = 8,707.72