Finding the Fourth Proportional to 30,685.57, 42,345.68 and 17,256.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,685.57 : 42,345.68 = 17,256.82 : x
2. Step 2: Convert to fraction form
   30,685.57/42,345.68 = 17,256.82/x
3. Step 3: Cross multiply
   30,685.57x = 42,345.68 × 17,256.82
4. Step 4: Simplify right side
   30,685.57x = 730,751,479.53
5. Step 5: Solve for x
   x = 730,751,479.53/30,685.57
6. Step 6: Final answer
   x = 23,814.18