Finding the Fourth Proportional to 21,907.31, 30,245.94 and 16,862.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,907.31 : 30,245.94 = 16,862.04 : x
2. Step 2: Convert to fraction form
   21,907.31/30,245.94 = 16,862.04/x
3. Step 3: Cross multiply
   21,907.31x = 30,245.94 × 16,862.04
4. Step 4: Simplify right side
   21,907.31x = 510,008,250.12
5. Step 5: Solve for x
   x = 510,008,250.12/21,907.31
6. Step 6: Final answer
   x = 23,280.28