Finding the Fourth Proportional to 31,150.08, 42,963.32 and 19,821.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,150.08 : 42,963.32 = 19,821.42 : x
2. Step 2: Convert to fraction form
   31,150.08/42,963.32 = 19,821.42/x
3. Step 3: Cross multiply
   31,150.08x = 42,963.32 × 19,821.42
4. Step 4: Simplify right side
   31,150.08x = 851,594,010.31
5. Step 5: Solve for x
   x = 851,594,010.31/31,150.08
6. Step 6: Final answer
   x = 27,338.42