Finding the Fourth Proportional to 30,890.37, 42,633.27 and 19,560.90

Step by Step Solution

1. Step 1: Write the proportion equation
   30,890.37 : 42,633.27 = 19,560.90 : x
2. Step 2: Convert to fraction form
   30,890.37/42,633.27 = 19,560.90/x
3. Step 3: Cross multiply
   30,890.37x = 42,633.27 × 19,560.90
4. Step 4: Simplify right side
   30,890.37x = 833,945,291.02
5. Step 5: Solve for x
   x = 833,945,291.02/30,890.37
6. Step 6: Final answer
   x = 26,996.93