Finding the Fourth Proportional to 10,380.70, 15,561.79 and 3,805.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,380.70 : 15,561.79 = 3,805.35 : x
2. Step 2: Convert to fraction form
   10,380.70/15,561.79 = 3,805.35/x
3. Step 3: Cross multiply
   10,380.70x = 15,561.79 × 3,805.35
4. Step 4: Simplify right side
   10,380.70x = 59,218,018.88
5. Step 5: Solve for x
   x = 59,218,018.88/10,380.70
6. Step 6: Final answer
   x = 5,704.63