Finding the Fourth Proportional to 30,636.86, 42,278.81 and 17,898.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,636.86 : 42,278.81 = 17,898.80 : x
2. Step 2: Convert to fraction form
   30,636.86/42,278.81 = 17,898.80/x
3. Step 3: Cross multiply
   30,636.86x = 42,278.81 × 17,898.80
4. Step 4: Simplify right side
   30,636.86x = 756,739,663.54
5. Step 5: Solve for x
   x = 756,739,663.54/30,636.86
6. Step 6: Final answer
   x = 24,700.31