Finding the Fourth Proportional to 18,870.88, 28,304.49 and 5,723.36

Step by Step Solution

1. Step 1: Write the proportion equation
   18,870.88 : 28,304.49 = 5,723.36 : x
2. Step 2: Convert to fraction form
   18,870.88/28,304.49 = 5,723.36/x
3. Step 3: Cross multiply
   18,870.88x = 28,304.49 × 5,723.36
4. Step 4: Simplify right side
   18,870.88x = 161,996,931.18
5. Step 5: Solve for x
   x = 161,996,931.18/18,870.88
6. Step 6: Final answer
   x = 8,584.49