Finding the Fourth Proportional to 30,868.17, 42,598.04 and 16,721.07

Step by Step Solution

1. Step 1: Write the proportion equation
   30,868.17 : 42,598.04 = 16,721.07 : x
2. Step 2: Convert to fraction form
   30,868.17/42,598.04 = 16,721.07/x
3. Step 3: Cross multiply
   30,868.17x = 42,598.04 × 16,721.07
4. Step 4: Simplify right side
   30,868.17x = 712,284,725.10
5. Step 5: Solve for x
   x = 712,284,725.10/30,868.17
6. Step 6: Final answer
   x = 23,075.06