Finding the Fourth Proportional to 31,057.08, 42,858.84 and 18,481

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.08 : 42,858.84 = 18,481 : x
2. Step 2: Convert to fraction form
   31,057.08/42,858.84 = 18,481/x
3. Step 3: Cross multiply
   31,057.08x = 42,858.84 × 18,481
4. Step 4: Simplify right side
   31,057.08x = 792,074,222.04
5. Step 5: Solve for x
   x = 792,074,222.04/31,057.08
6. Step 6: Final answer
   x = 25,503.82