Finding the Fourth Proportional to 20,735.20, 31,100.51 and 7,405.34

Step by Step Solution

1. Step 1: Write the proportion equation
   20,735.20 : 31,100.51 = 7,405.34 : x
2. Step 2: Convert to fraction form
   20,735.20/31,100.51 = 7,405.34/x
3. Step 3: Cross multiply
   20,735.20x = 31,100.51 × 7,405.34
4. Step 4: Simplify right side
   20,735.20x = 230,309,850.72
5. Step 5: Solve for x
   x = 230,309,850.72/20,735.20
6. Step 6: Final answer
   x = 11,107.19