Finding the Fourth Proportional to 31,131.36, 42,966.72 and 18,563.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.36 : 42,966.72 = 18,563.04 : x
2. Step 2: Convert to fraction form
   31,131.36/42,966.72 = 18,563.04/x
3. Step 3: Cross multiply
   31,131.36x = 42,966.72 × 18,563.04
4. Step 4: Simplify right side
   31,131.36x = 797,592,942.03
5. Step 5: Solve for x
   x = 797,592,942.03/31,131.36
6. Step 6: Final answer
   x = 25,620.24