Finding the Fourth Proportional to 7,120.50, 9,826.35 and 3,977.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,120.50 : 9,826.35 = 3,977.34 : x
2. Step 2: Convert to fraction form
   7,120.50/9,826.35 = 3,977.34/x
3. Step 3: Cross multiply
   7,120.50x = 9,826.35 × 3,977.34
4. Step 4: Simplify right side
   7,120.50x = 39,082,734.91
5. Step 5: Solve for x
   x = 39,082,734.91/7,120.50
6. Step 6: Final answer
   x = 5,488.76