Finding the Fourth Proportional to 13,868.84, 19,139.28 and 7,581.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,868.84 : 19,139.28 = 7,581.62 : x
2. Step 2: Convert to fraction form
   13,868.84/19,139.28 = 7,581.62/x
3. Step 3: Cross multiply
   13,868.84x = 19,139.28 × 7,581.62
4. Step 4: Simplify right side
   13,868.84x = 145,106,748.03
5. Step 5: Solve for x
   x = 145,106,748.03/13,868.84
6. Step 6: Final answer
   x = 10,462.79