Finding the Fourth Proportional to 39,772.33, 54,885.82 and 21,868.54

Step by Step Solution

1. Step 1: Write the proportion equation
   39,772.33 : 54,885.82 = 21,868.54 : x
2. Step 2: Convert to fraction form
   39,772.33/54,885.82 = 21,868.54/x
3. Step 3: Cross multiply
   39,772.33x = 54,885.82 × 21,868.54
4. Step 4: Simplify right side
   39,772.33x = 1,200,272,558.22
5. Step 5: Solve for x
   x = 1,200,272,558.22/39,772.33
6. Step 6: Final answer
   x = 30,178.58