Finding the Fourth Proportional to 30,797.72, 42,485.57 and 19,892.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,797.72 : 42,485.57 = 19,892.10 : x
2. Step 2: Convert to fraction form
   30,797.72/42,485.57 = 19,892.10/x
3. Step 3: Cross multiply
   30,797.72x = 42,485.57 × 19,892.10
4. Step 4: Simplify right side
   30,797.72x = 845,127,341.45
5. Step 5: Solve for x
   x = 845,127,341.45/30,797.72
6. Step 6: Final answer
   x = 27,441.23