Finding the Fourth Proportional to 5,275.10, 7,912.72 and 1,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,275.10 : 7,912.72 = 1,379.50 : x
2. Step 2: Convert to fraction form
   5,275.10/7,912.72 = 1,379.50/x
3. Step 3: Cross multiply
   5,275.10x = 7,912.72 × 1,379.50
4. Step 4: Simplify right side
   5,275.10x = 10,915,597.24
5. Step 5: Solve for x
   x = 10,915,597.24/5,275.10
6. Step 6: Final answer
   x = 2,069.27