Finding the Fourth Proportional to 22,557.37, 31,128.74 and 12,485.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,557.37 : 31,128.74 = 12,485.82 : x
2. Step 2: Convert to fraction form
   22,557.37/31,128.74 = 12,485.82/x
3. Step 3: Cross multiply
   22,557.37x = 31,128.74 × 12,485.82
4. Step 4: Simplify right side
   22,557.37x = 388,667,844.47
5. Step 5: Solve for x
   x = 388,667,844.47/22,557.37
6. Step 6: Final answer
   x = 17,230.19