Finding the Fourth Proportional to 10,245.72, 14,138.52 and 5,769.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,245.72 : 14,138.52 = 5,769.60 : x
2. Step 2: Convert to fraction form
   10,245.72/14,138.52 = 5,769.60/x
3. Step 3: Cross multiply
   10,245.72x = 14,138.52 × 5,769.60
4. Step 4: Simplify right side
   10,245.72x = 81,573,604.99
5. Step 5: Solve for x
   x = 81,573,604.99/10,245.72
6. Step 6: Final answer
   x = 7,961.72