Finding the Fourth Proportional to 18,266.67, 27,397.89 and 5,120.10

Step by Step Solution

1. Step 1: Write the proportion equation
   18,266.67 : 27,397.89 = 5,120.10 : x
2. Step 2: Convert to fraction form
   18,266.67/27,397.89 = 5,120.10/x
3. Step 3: Cross multiply
   18,266.67x = 27,397.89 × 5,120.10
4. Step 4: Simplify right side
   18,266.67x = 140,279,936.59
5. Step 5: Solve for x
   x = 140,279,936.59/18,266.67
6. Step 6: Final answer
   x = 7,679.56