Finding the Fourth Proportional to 30,601.83, 42,219.69 and 19,997.61

Step by Step Solution

1. Step 1: Write the proportion equation
   30,601.83 : 42,219.69 = 19,997.61 : x
2. Step 2: Convert to fraction form
   30,601.83/42,219.69 = 19,997.61/x
3. Step 3: Cross multiply
   30,601.83x = 42,219.69 × 19,997.61
4. Step 4: Simplify right side
   30,601.83x = 844,292,894.94
5. Step 5: Solve for x
   x = 844,292,894.94/30,601.83
6. Step 6: Final answer
   x = 27,589.62