Finding the Fourth Proportional to 13,868.96, 19,139.04 and 7,821.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,868.96 : 19,139.04 = 7,821.14 : x
2. Step 2: Convert to fraction form
   13,868.96/19,139.04 = 7,821.14/x
3. Step 3: Cross multiply
   13,868.96x = 19,139.04 × 7,821.14
4. Step 4: Simplify right side
   13,868.96x = 149,689,111.31
5. Step 5: Solve for x
   x = 149,689,111.31/13,868.96
6. Step 6: Final answer
   x = 10,793.10