Finding the Fourth Proportional to 5,139.30, 7,708.72 and 1,441.45

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.30 : 7,708.72 = 1,441.45 : x
2. Step 2: Convert to fraction form
   5,139.30/7,708.72 = 1,441.45/x
3. Step 3: Cross multiply
   5,139.30x = 7,708.72 × 1,441.45
4. Step 4: Simplify right side
   5,139.30x = 11,111,699.82
5. Step 5: Solve for x
   x = 11,111,699.82/5,139.30
6. Step 6: Final answer
   x = 2,162.10