Finding the Fourth Proportional to 36,121.05, 49,854.83 and 21,978.45

Step by Step Solution

1. Step 1: Write the proportion equation
   36,121.05 : 49,854.83 = 21,978.45 : x
2. Step 2: Convert to fraction form
   36,121.05/49,854.83 = 21,978.45/x
3. Step 3: Cross multiply
   36,121.05x = 49,854.83 × 21,978.45
4. Step 4: Simplify right side
   36,121.05x = 1,095,731,778.52
5. Step 5: Solve for x
   x = 1,095,731,778.52/36,121.05
6. Step 6: Final answer
   x = 30,334.99