Finding the Fourth Proportional to 13,869.33, 19,139.69 and 7,581.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,869.33 : 19,139.69 = 7,581.71 : x
2. Step 2: Convert to fraction form
   13,869.33/19,139.69 = 7,581.71/x
3. Step 3: Cross multiply
   13,869.33x = 19,139.69 × 7,581.71
4. Step 4: Simplify right side
   13,869.33x = 145,111,445.46
5. Step 5: Solve for x
   x = 145,111,445.46/13,869.33
6. Step 6: Final answer
   x = 10,462.76