Finding the Fourth Proportional to 30,957.91, 42,722.37 and 17,528.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,957.91 : 42,722.37 = 17,528.78 : x
2. Step 2: Convert to fraction form
   30,957.91/42,722.37 = 17,528.78/x
3. Step 3: Cross multiply
   30,957.91x = 42,722.37 × 17,528.78
4. Step 4: Simplify right side
   30,957.91x = 748,871,131.61
5. Step 5: Solve for x
   x = 748,871,131.61/30,957.91
6. Step 6: Final answer
   x = 24,189.98