Finding the Fourth Proportional to 13,105.87, 19,647 and 4,780.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.87 : 19,647 = 4,780.08 : x
2. Step 2: Convert to fraction form
   13,105.87/19,647 = 4,780.08/x
3. Step 3: Cross multiply
   13,105.87x = 19,647 × 4,780.08
4. Step 4: Simplify right side
   13,105.87x = 93,914,231.76
5. Step 5: Solve for x
   x = 93,914,231.76/13,105.87
6. Step 6: Final answer
   x = 7,165.82