Finding the Fourth Proportional to 35,665.19, 49,217.89 and 20,557.76

Step by Step Solution

1. Step 1: Write the proportion equation
   35,665.19 : 49,217.89 = 20,557.76 : x
2. Step 2: Convert to fraction form
   35,665.19/49,217.89 = 20,557.76/x
3. Step 3: Cross multiply
   35,665.19x = 49,217.89 × 20,557.76
4. Step 4: Simplify right side
   35,665.19x = 1,011,809,311.39
5. Step 5: Solve for x
   x = 1,011,809,311.39/35,665.19
6. Step 6: Final answer
   x = 28,369.66