Finding the Fourth Proportional to 10,086.81, 15,131.83 and 4,245.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.81 : 15,131.83 = 4,245.09 : x
2. Step 2: Convert to fraction form
   10,086.81/15,131.83 = 4,245.09/x
3. Step 3: Cross multiply
   10,086.81x = 15,131.83 × 4,245.09
4. Step 4: Simplify right side
   10,086.81x = 64,235,980.21
5. Step 5: Solve for x
   x = 64,235,980.21/10,086.81
6. Step 6: Final answer
   x = 6,368.31