Finding the Fourth Proportional to 19,805.81, 27,330.50 and 10,851.87

Step by Step Solution

1. Step 1: Write the proportion equation
   19,805.81 : 27,330.50 = 10,851.87 : x
2. Step 2: Convert to fraction form
   19,805.81/27,330.50 = 10,851.87/x
3. Step 3: Cross multiply
   19,805.81x = 27,330.50 × 10,851.87
4. Step 4: Simplify right side
   19,805.81x = 296,586,978.78
5. Step 5: Solve for x
   x = 296,586,978.78/19,805.81
6. Step 6: Final answer
   x = 14,974.75