Finding the Fourth Proportional to 41,020.42, 56,579.88 and 31,485.10

Step by Step Solution

1. Step 1: Write the proportion equation
   41,020.42 : 56,579.88 = 31,485.10 : x
2. Step 2: Convert to fraction form
   41,020.42/56,579.88 = 31,485.10/x
3. Step 3: Cross multiply
   41,020.42x = 56,579.88 × 31,485.10
4. Step 4: Simplify right side
   41,020.42x = 1,781,423,179.79
5. Step 5: Solve for x
   x = 1,781,423,179.79/41,020.42
6. Step 6: Final answer
   x = 43,427.72