Finding the Fourth Proportional to 30,969.29, 42,725.59 and 21,907.97

Step by Step Solution

1. Step 1: Write the proportion equation
   30,969.29 : 42,725.59 = 21,907.97 : x
2. Step 2: Convert to fraction form
   30,969.29/42,725.59 = 21,907.97/x
3. Step 3: Cross multiply
   30,969.29x = 42,725.59 × 21,907.97
4. Step 4: Simplify right side
   30,969.29x = 936,030,943.95
5. Step 5: Solve for x
   x = 936,030,943.95/30,969.29
6. Step 6: Final answer
   x = 30,224.49