Finding the Fourth Proportional to 39,182.34, 54,072.56 and 21,278.10

Step by Step Solution

1. Step 1: Write the proportion equation
   39,182.34 : 54,072.56 = 21,278.10 : x
2. Step 2: Convert to fraction form
   39,182.34/54,072.56 = 21,278.10/x
3. Step 3: Cross multiply
   39,182.34x = 54,072.56 × 21,278.10
4. Step 4: Simplify right side
   39,182.34x = 1,150,561,338.94
5. Step 5: Solve for x
   x = 1,150,561,338.94/39,182.34
6. Step 6: Final answer
   x = 29,364.28