Finding the Fourth Proportional to 20,964.42, 31,445.76 and 7,113.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,964.42 : 31,445.76 = 7,113.42 : x
2. Step 2: Convert to fraction form
   20,964.42/31,445.76 = 7,113.42/x
3. Step 3: Cross multiply
   20,964.42x = 31,445.76 × 7,113.42
4. Step 4: Simplify right side
   20,964.42x = 223,686,898.10
5. Step 5: Solve for x
   x = 223,686,898.10/20,964.42
6. Step 6: Final answer
   x = 10,669.83