Finding the Fourth Proportional to 53,390.43, 80,080.17 and 13,942.41

Step by Step Solution

1. Step 1: Write the proportion equation
   53,390.43 : 80,080.17 = 13,942.41 : x
2. Step 2: Convert to fraction form
   53,390.43/80,080.17 = 13,942.41/x
3. Step 3: Cross multiply
   53,390.43x = 80,080.17 × 13,942.41
4. Step 4: Simplify right side
   53,390.43x = 1,116,510,563.01
5. Step 5: Solve for x
   x = 1,116,510,563.01/53,390.43
6. Step 6: Final answer
   x = 20,912.19