Finding the Fourth Proportional to 28,020.24, 38,667.52 and 15,444.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,020.24 : 38,667.52 = 15,444.72 : x
2. Step 2: Convert to fraction form
   28,020.24/38,667.52 = 15,444.72/x
3. Step 3: Cross multiply
   28,020.24x = 38,667.52 × 15,444.72
4. Step 4: Simplify right side
   28,020.24x = 597,209,019.49
5. Step 5: Solve for x
   x = 597,209,019.49/28,020.24
6. Step 6: Final answer
   x = 21,313.49