Finding the Fourth Proportional to 10,525.20, 15,782.37 and 3,859.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,525.20 : 15,782.37 = 3,859.99 : x
2. Step 2: Convert to fraction form
   10,525.20/15,782.37 = 3,859.99/x
3. Step 3: Cross multiply
   10,525.20x = 15,782.37 × 3,859.99
4. Step 4: Simplify right side
   10,525.20x = 60,919,789.19
5. Step 5: Solve for x
   x = 60,919,789.19/10,525.20
6. Step 6: Final answer
   x = 5,787.99