Finding the Fourth Proportional to 39,872.82, 55,022.52 and 21,967.35

Step by Step Solution

1. Step 1: Write the proportion equation
   39,872.82 : 55,022.52 = 21,967.35 : x
2. Step 2: Convert to fraction form
   39,872.82/55,022.52 = 21,967.35/x
3. Step 3: Cross multiply
   39,872.82x = 55,022.52 × 21,967.35
4. Step 4: Simplify right side
   39,872.82x = 1,208,698,954.72
5. Step 5: Solve for x
   x = 1,208,698,954.72/39,872.82
6. Step 6: Final answer
   x = 30,313.86