Finding the Fourth Proportional to 13,506.84, 18,639.72 and 7,538.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,506.84 : 18,639.72 = 7,538.76 : x
2. Step 2: Convert to fraction form
   13,506.84/18,639.72 = 7,538.76/x
3. Step 3: Cross multiply
   13,506.84x = 18,639.72 × 7,538.76
4. Step 4: Simplify right side
   13,506.84x = 140,520,375.55
5. Step 5: Solve for x
   x = 140,520,375.55/13,506.84
6. Step 6: Final answer
   x = 10,403.65