Finding the Fourth Proportional to 13,869.10, 19,139.33 and 7,581.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,869.10 : 19,139.33 = 7,581.47 : x
2. Step 2: Convert to fraction form
   13,869.10/19,139.33 = 7,581.47/x
3. Step 3: Cross multiply
   13,869.10x = 19,139.33 × 7,581.47
4. Step 4: Simplify right side
   13,869.10x = 145,104,218.31
5. Step 5: Solve for x
   x = 145,104,218.31/13,869.10
6. Step 6: Final answer
   x = 10,462.41