Finding the Fourth Proportional to 13,171.86, 19,765.58 and 4,857.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,171.86 : 19,765.58 = 4,857.69 : x
2. Step 2: Convert to fraction form
   13,171.86/19,765.58 = 4,857.69/x
3. Step 3: Cross multiply
   13,171.86x = 19,765.58 × 4,857.69
4. Step 4: Simplify right side
   13,171.86x = 96,015,036.02
5. Step 5: Solve for x
   x = 96,015,036.02/13,171.86
6. Step 6: Final answer
   x = 7,289.41