Finding the Fourth Proportional to 21,155.97, 31,735.55 and 7,116.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,155.97 : 31,735.55 = 7,116.04 : x
2. Step 2: Convert to fraction form
   21,155.97/31,735.55 = 7,116.04/x
3. Step 3: Cross multiply
   21,155.97x = 31,735.55 × 7,116.04
4. Step 4: Simplify right side
   21,155.97x = 225,831,443.22
5. Step 5: Solve for x
   x = 225,831,443.22/21,155.97
6. Step 6: Final answer
   x = 10,674.60