Finding the Fourth Proportional to 10,245.21, 14,138.67 and 5,769.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,245.21 : 14,138.67 = 5,769.12 : x
2. Step 2: Convert to fraction form
   10,245.21/14,138.67 = 5,769.12/x
3. Step 3: Cross multiply
   10,245.21x = 14,138.67 × 5,769.12
4. Step 4: Simplify right side
   10,245.21x = 81,567,683.87
5. Step 5: Solve for x
   x = 81,567,683.87/10,245.21
6. Step 6: Final answer
   x = 7,961.54