Finding the Fourth Proportional to 36,216.28, 49,978.56 and 21,107.80

Step by Step Solution

1. Step 1: Write the proportion equation
   36,216.28 : 49,978.56 = 21,107.80 : x
2. Step 2: Convert to fraction form
   36,216.28/49,978.56 = 21,107.80/x
3. Step 3: Cross multiply
   36,216.28x = 49,978.56 × 21,107.80
4. Step 4: Simplify right side
   36,216.28x = 1,054,937,448.77
5. Step 5: Solve for x
   x = 1,054,937,448.77/36,216.28
6. Step 6: Final answer
   x = 29,128.82