Finding the Fourth Proportional to 30,549.42, 42,160.50 and 17,121.24

Step by Step Solution

1. Step 1: Write the proportion equation
   30,549.42 : 42,160.50 = 17,121.24 : x
2. Step 2: Convert to fraction form
   30,549.42/42,160.50 = 17,121.24/x
3. Step 3: Cross multiply
   30,549.42x = 42,160.50 × 17,121.24
4. Step 4: Simplify right side
   30,549.42x = 721,840,039.02
5. Step 5: Solve for x
   x = 721,840,039.02/30,549.42
6. Step 6: Final answer
   x = 23,628.60