Finding the Fourth Proportional to 31,111, 42,939.88 and 18,359.44

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111 : 42,939.88 = 18,359.44 : x
2. Step 2: Convert to fraction form
   31,111/42,939.88 = 18,359.44/x
3. Step 3: Cross multiply
   31,111x = 42,939.88 × 18,359.44
4. Step 4: Simplify right side
   31,111x = 788,352,150.47
5. Step 5: Solve for x
   x = 788,352,150.47/31,111
6. Step 6: Final answer
   x = 25,339.98