Finding the Fourth Proportional to 22,520.42, 31,077.63 and 12,448.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.42 : 31,077.63 = 12,448.60 : x
2. Step 2: Convert to fraction form
   22,520.42/31,077.63 = 12,448.60/x
3. Step 3: Cross multiply
   22,520.42x = 31,077.63 × 12,448.60
4. Step 4: Simplify right side
   22,520.42x = 386,872,984.82
5. Step 5: Solve for x
   x = 386,872,984.82/22,520.42
6. Step 6: Final answer
   x = 17,178.76