Finding the Fourth Proportional to 7,098.81, 10,641.33 and 3,980.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,098.81 : 10,641.33 = 3,980.31 : x
2. Step 2: Convert to fraction form
   7,098.81/10,641.33 = 3,980.31/x
3. Step 3: Cross multiply
   7,098.81x = 10,641.33 × 3,980.31
4. Step 4: Simplify right side
   7,098.81x = 42,355,792.21
5. Step 5: Solve for x
   x = 42,355,792.21/7,098.81
6. Step 6: Final answer
   x = 5,966.60