Finding the Fourth Proportional to 38,907.37, 53,686.25 and 21,910.72

Step by Step Solution

1. Step 1: Write the proportion equation
   38,907.37 : 53,686.25 = 21,910.72 : x
2. Step 2: Convert to fraction form
   38,907.37/53,686.25 = 21,910.72/x
3. Step 3: Cross multiply
   38,907.37x = 53,686.25 × 21,910.72
4. Step 4: Simplify right side
   38,907.37x = 1,176,304,282.05
5. Step 5: Solve for x
   x = 1,176,304,282.05/38,907.37
6. Step 6: Final answer
   x = 30,233.46