Finding the Fourth Proportional to 21,152.40, 31,731.32 and 7,106.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.40 : 31,731.32 = 7,106.37 : x
2. Step 2: Convert to fraction form
   21,152.40/31,731.32 = 7,106.37/x
3. Step 3: Cross multiply
   21,152.40x = 31,731.32 × 7,106.37
4. Step 4: Simplify right side
   21,152.40x = 225,494,500.51
5. Step 5: Solve for x
   x = 225,494,500.51/21,152.40
6. Step 6: Final answer
   x = 10,660.47