Finding the Fourth Proportional to 30,806.38, 42,512.88 and 17,377.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,806.38 : 42,512.88 = 17,377.12 : x
2. Step 2: Convert to fraction form
   30,806.38/42,512.88 = 17,377.12/x
3. Step 3: Cross multiply
   30,806.38x = 42,512.88 × 17,377.12
4. Step 4: Simplify right side
   30,806.38x = 738,751,417.31
5. Step 5: Solve for x
   x = 738,751,417.31/30,806.38
6. Step 6: Final answer
   x = 23,980.47