Finding the Fourth Proportional to 20,456.75, 30,681.69 and 5,667.17

Step by Step Solution

1. Step 1: Write the proportion equation
   20,456.75 : 30,681.69 = 5,667.17 : x
2. Step 2: Convert to fraction form
   20,456.75/30,681.69 = 5,667.17/x
3. Step 3: Cross multiply
   20,456.75x = 30,681.69 × 5,667.17
4. Step 4: Simplify right side
   20,456.75x = 173,878,199.71
5. Step 5: Solve for x
   x = 173,878,199.71/20,456.75
6. Step 6: Final answer
   x = 8,499.80