Finding the Fourth Proportional to 7,120.34, 9,826.32 and 3,976.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,120.34 : 9,826.32 = 3,976.72 : x
2. Step 2: Convert to fraction form
   7,120.34/9,826.32 = 3,976.72/x
3. Step 3: Cross multiply
   7,120.34x = 9,826.32 × 3,976.72
4. Step 4: Simplify right side
   7,120.34x = 39,076,523.27
5. Step 5: Solve for x
   x = 39,076,523.27/7,120.34
6. Step 6: Final answer
   x = 5,488.01