Finding the Fourth Proportional to 42,028.16, 57,998.52 and 31,321.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,028.16 : 57,998.52 = 31,321.04 : x
2. Step 2: Convert to fraction form
   42,028.16/57,998.52 = 31,321.04/x
3. Step 3: Cross multiply
   42,028.16x = 57,998.52 × 31,321.04
4. Step 4: Simplify right side
   42,028.16x = 1,816,573,964.86
5. Step 5: Solve for x
   x = 1,816,573,964.86/42,028.16
6. Step 6: Final answer
   x = 43,222.78