Finding the Fourth Proportional to 43,231.05, 59,665.41 and 31,290.03

Step by Step Solution

1. Step 1: Write the proportion equation
   43,231.05 : 59,665.41 = 31,290.03 : x
2. Step 2: Convert to fraction form
   43,231.05/59,665.41 = 31,290.03/x
3. Step 3: Cross multiply
   43,231.05x = 59,665.41 × 31,290.03
4. Step 4: Simplify right side
   43,231.05x = 1,866,932,468.86
5. Step 5: Solve for x
   x = 1,866,932,468.86/43,231.05
6. Step 6: Final answer
   x = 43,184.99