Finding the Fourth Proportional to 30,742.86, 42,426 and 18,805.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,742.86 : 42,426 = 18,805.98 : x
2. Step 2: Convert to fraction form
   30,742.86/42,426 = 18,805.98/x
3. Step 3: Cross multiply
   30,742.86x = 42,426 × 18,805.98
4. Step 4: Simplify right side
   30,742.86x = 797,862,507.48
5. Step 5: Solve for x
   x = 797,862,507.48/30,742.86
6. Step 6: Final answer
   x = 25,952.77