Finding the Fourth Proportional to 42,940.17, 59,230.17 and 31,021.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,940.17 : 59,230.17 = 31,021.02 : x
2. Step 2: Convert to fraction form
   42,940.17/59,230.17 = 31,021.02/x
3. Step 3: Cross multiply
   42,940.17x = 59,230.17 × 31,021.02
4. Step 4: Simplify right side
   42,940.17x = 1,837,380,288.17
5. Step 5: Solve for x
   x = 1,837,380,288.17/42,940.17
6. Step 6: Final answer
   x = 42,789.31