Finding the Fourth Proportional to 30,570.56, 42,187.60 and 19,953.92

Step by Step Solution

1. Step 1: Write the proportion equation
   30,570.56 : 42,187.60 = 19,953.92 : x
2. Step 2: Convert to fraction form
   30,570.56/42,187.60 = 19,953.92/x
3. Step 3: Cross multiply
   30,570.56x = 42,187.60 × 19,953.92
4. Step 4: Simplify right side
   30,570.56x = 841,807,995.39
5. Step 5: Solve for x
   x = 841,807,995.39/30,570.56
6. Step 6: Final answer
   x = 27,536.56