Finding the Fourth Proportional to 19,870.56, 27,422.08 and 10,918.37

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.56 : 27,422.08 = 10,918.37 : x
2. Step 2: Convert to fraction form
   19,870.56/27,422.08 = 10,918.37/x
3. Step 3: Cross multiply
   19,870.56x = 27,422.08 × 10,918.37
4. Step 4: Simplify right side
   19,870.56x = 299,404,456.87
5. Step 5: Solve for x
   x = 299,404,456.87/19,870.56
6. Step 6: Final answer
   x = 15,067.74