Finding the Fourth Proportional to 7,106.50, 9,806.85 and 3,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,106.50 : 9,806.85 = 3,920.10 : x
2. Step 2: Convert to fraction form
   7,106.50/9,806.85 = 3,920.10/x
3. Step 3: Cross multiply
   7,106.50x = 9,806.85 × 3,920.10
4. Step 4: Simplify right side
   7,106.50x = 38,443,832.69
5. Step 5: Solve for x
   x = 38,443,832.69/7,106.50
6. Step 6: Final answer
   x = 5,409.67