Finding the Fourth Proportional to 39,885.77, 55,042.46 and 21,736.62

Step by Step Solution

1. Step 1: Write the proportion equation
   39,885.77 : 55,042.46 = 21,736.62 : x
2. Step 2: Convert to fraction form
   39,885.77/55,042.46 = 21,736.62/x
3. Step 3: Cross multiply
   39,885.77x = 55,042.46 × 21,736.62
4. Step 4: Simplify right side
   39,885.77x = 1,196,436,928.20
5. Step 5: Solve for x
   x = 1,196,436,928.20/39,885.77
6. Step 6: Final answer
   x = 29,996.59