Finding the Fourth Proportional to 19,856.69, 27,402.53 and 10,905

Step by Step Solution

1. Step 1: Write the proportion equation
   19,856.69 : 27,402.53 = 10,905 : x
2. Step 2: Convert to fraction form
   19,856.69/27,402.53 = 10,905/x
3. Step 3: Cross multiply
   19,856.69x = 27,402.53 × 10,905
4. Step 4: Simplify right side
   19,856.69x = 298,824,535.13
5. Step 5: Solve for x
   x = 298,824,535.13/19,856.69
6. Step 6: Final answer
   x = 15,049.06