Finding the Fourth Proportional to 20,261.59, 30,395.42 and 7,111.64

Step by Step Solution

1. Step 1: Write the proportion equation
   20,261.59 : 30,395.42 = 7,111.64 : x
2. Step 2: Convert to fraction form
   20,261.59/30,395.42 = 7,111.64/x
3. Step 3: Cross multiply
   20,261.59x = 30,395.42 × 7,111.64
4. Step 4: Simplify right side
   20,261.59x = 216,161,284.69
5. Step 5: Solve for x
   x = 216,161,284.69/20,261.59
6. Step 6: Final answer
   x = 10,668.53