Finding the Fourth Proportional to 7,120.52, 9,826.28 and 3,976.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,120.52 : 9,826.28 = 3,976.68 : x
2. Step 2: Convert to fraction form
   7,120.52/9,826.28 = 3,976.68/x
3. Step 3: Cross multiply
   7,120.52x = 9,826.28 × 3,976.68
4. Step 4: Simplify right side
   7,120.52x = 39,075,971.15
5. Step 5: Solve for x
   x = 39,075,971.15/7,120.52
6. Step 6: Final answer
   x = 5,487.80