Finding the Fourth Proportional to 36,128.31, 49,856.58 and 20,212.89

Step by Step Solution

1. Step 1: Write the proportion equation
   36,128.31 : 49,856.58 = 20,212.89 : x
2. Step 2: Convert to fraction form
   36,128.31/49,856.58 = 20,212.89/x
3. Step 3: Cross multiply
   36,128.31x = 49,856.58 × 20,212.89
4. Step 4: Simplify right side
   36,128.31x = 1,007,745,567.32
5. Step 5: Solve for x
   x = 1,007,745,567.32/36,128.31
6. Step 6: Final answer
   x = 27,893.52