Finding the Fourth Proportional to 30,474.24, 42,045.12 and 19,860

Step by Step Solution

1. Step 1: Write the proportion equation
   30,474.24 : 42,045.12 = 19,860 : x
2. Step 2: Convert to fraction form
   30,474.24/42,045.12 = 19,860/x
3. Step 3: Cross multiply
   30,474.24x = 42,045.12 × 19,860
4. Step 4: Simplify right side
   30,474.24x = 835,016,083.20
5. Step 5: Solve for x
   x = 835,016,083.20/30,474.24
6. Step 6: Final answer
   x = 27,400.72