Finding the Fourth Proportional to 31,424.88, 47,145 and 10,648.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,424.88 : 47,145 = 10,648.56 : x
2. Step 2: Convert to fraction form
   31,424.88/47,145 = 10,648.56/x
3. Step 3: Cross multiply
   31,424.88x = 47,145 × 10,648.56
4. Step 4: Simplify right side
   31,424.88x = 502,026,361.20
5. Step 5: Solve for x
   x = 502,026,361.20/31,424.88
6. Step 6: Final answer
   x = 15,975.44