Finding the Fourth Proportional to 30,939.30, 42,696.21 and 17,510.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,939.30 : 42,696.21 = 17,510.31 : x
2. Step 2: Convert to fraction form
   30,939.30/42,696.21 = 17,510.31/x
3. Step 3: Cross multiply
   30,939.30x = 42,696.21 × 17,510.31
4. Step 4: Simplify right side
   30,939.30x = 747,623,872.93
5. Step 5: Solve for x
   x = 747,623,872.93/30,939.30
6. Step 6: Final answer
   x = 24,164.21