Finding the Fourth Proportional to 30,911.94, 42,658.17 and 17,485.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,911.94 : 42,658.17 = 17,485.81 : x
2. Step 2: Convert to fraction form
   30,911.94/42,658.17 = 17,485.81/x
3. Step 3: Cross multiply
   30,911.94x = 42,658.17 × 17,485.81
4. Step 4: Simplify right side
   30,911.94x = 745,912,655.57
5. Step 5: Solve for x
   x = 745,912,655.57/30,911.94
6. Step 6: Final answer
   x = 24,130.24