Finding the Fourth Proportional to 22,471.81, 31,010.57 and 12,400.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,471.81 : 31,010.57 = 12,400.25 : x
2. Step 2: Convert to fraction form
   22,471.81/31,010.57 = 12,400.25/x
3. Step 3: Cross multiply
   22,471.81x = 31,010.57 × 12,400.25
4. Step 4: Simplify right side
   22,471.81x = 384,538,820.64
5. Step 5: Solve for x
   x = 384,538,820.64/22,471.81
6. Step 6: Final answer
   x = 17,112.05