Finding the Fourth Proportional to 41,131.10, 56,731.56 and 28,389.10

Step by Step Solution

1. Step 1: Write the proportion equation
   41,131.10 : 56,731.56 = 28,389.10 : x
2. Step 2: Convert to fraction form
   41,131.10/56,731.56 = 28,389.10/x
3. Step 3: Cross multiply
   41,131.10x = 56,731.56 × 28,389.10
4. Step 4: Simplify right side
   41,131.10x = 1,610,557,930.00
5. Step 5: Solve for x
   x = 1,610,557,930.00/41,131.10
6. Step 6: Final answer
   x = 39,156.69