Finding the Fourth Proportional to 18,667.18, 28,012.49 and 7,573.91

Step by Step Solution

1. Step 1: Write the proportion equation
   18,667.18 : 28,012.49 = 7,573.91 : x
2. Step 2: Convert to fraction form
   18,667.18/28,012.49 = 7,573.91/x
3. Step 3: Cross multiply
   18,667.18x = 28,012.49 × 7,573.91
4. Step 4: Simplify right side
   18,667.18x = 212,164,040.27
5. Step 5: Solve for x
   x = 212,164,040.27/18,667.18
6. Step 6: Final answer
   x = 11,365.62