Finding the Fourth Proportional to 10,387.12, 15,582.72 and 3,813.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387.12 : 15,582.72 = 3,813.37 : x
2. Step 2: Convert to fraction form
   10,387.12/15,582.72 = 3,813.37/x
3. Step 3: Cross multiply
   10,387.12x = 15,582.72 × 3,813.37
4. Step 4: Simplify right side
   10,387.12x = 59,422,676.97
5. Step 5: Solve for x
   x = 59,422,676.97/10,387.12
6. Step 6: Final answer
   x = 5,720.80