Finding the Fourth Proportional to 39,908.77, 55,076.56 and 22,003.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,908.77 : 55,076.56 = 22,003.72 : x
2. Step 2: Convert to fraction form
   39,908.77/55,076.56 = 22,003.72/x
3. Step 3: Cross multiply
   39,908.77x = 55,076.56 × 22,003.72
4. Step 4: Simplify right side
   39,908.77x = 1,211,889,012.10
5. Step 5: Solve for x
   x = 1,211,889,012.10/39,908.77
6. Step 6: Final answer
   x = 30,366.49