Finding the Fourth Proportional to 19,855.09, 27,398.78 and 10,902.55

Step by Step Solution

1. Step 1: Write the proportion equation
   19,855.09 : 27,398.78 = 10,902.55 : x
2. Step 2: Convert to fraction form
   19,855.09/27,398.78 = 10,902.55/x
3. Step 3: Cross multiply
   19,855.09x = 27,398.78 × 10,902.55
4. Step 4: Simplify right side
   19,855.09x = 298,716,568.89
5. Step 5: Solve for x
   x = 298,716,568.89/19,855.09
6. Step 6: Final answer
   x = 15,044.84