Finding the Fourth Proportional to 30,922.61, 42,659.19 and 18,981.59

Step by Step Solution

1. Step 1: Write the proportion equation
   30,922.61 : 42,659.19 = 18,981.59 : x
2. Step 2: Convert to fraction form
   30,922.61/42,659.19 = 18,981.59/x
3. Step 3: Cross multiply
   30,922.61x = 42,659.19 × 18,981.59
4. Step 4: Simplify right side
   30,922.61x = 809,739,041.02
5. Step 5: Solve for x
   x = 809,739,041.02/30,922.61
6. Step 6: Final answer
   x = 26,185.99