Finding the Fourth Proportional to 13,086.84, 19,631.36 and 5,691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.84 : 19,631.36 = 5,691.56 : x
2. Step 2: Convert to fraction form
   13,086.84/19,631.36 = 5,691.56/x
3. Step 3: Cross multiply
   13,086.84x = 19,631.36 × 5,691.56
4. Step 4: Simplify right side
   13,086.84x = 111,733,063.32
5. Step 5: Solve for x
   x = 111,733,063.32/13,086.84
6. Step 6: Final answer
   x = 8,537.82