Finding the Fourth Proportional to 14,389.60, 21,581.52 and 3,998.56

Step by Step Solution

1. Step 1: Write the proportion equation
   14,389.60 : 21,581.52 = 3,998.56 : x
2. Step 2: Convert to fraction form
   14,389.60/21,581.52 = 3,998.56/x
3. Step 3: Cross multiply
   14,389.60x = 21,581.52 × 3,998.56
4. Step 4: Simplify right side
   14,389.60x = 86,295,002.61
5. Step 5: Solve for x
   x = 86,295,002.61/14,389.60
6. Step 6: Final answer
   x = 5,997.04