Finding the Fourth Proportional to 9,145.31, 13,718.00 and 2,219.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.31 : 13,718.00 = 2,219.81 : x
2. Step 2: Convert to fraction form
   9,145.31/13,718.00 = 2,219.81/x
3. Step 3: Cross multiply
   9,145.31x = 13,718.00 × 2,219.81
4. Step 4: Simplify right side
   9,145.31x = 30,451,393.42
5. Step 5: Solve for x
   x = 30,451,393.42/9,145.31
6. Step 6: Final answer
   x = 3,329.73