Finding the Fourth Proportional to 21,152.05, 31,541.32 and 20,962.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.05 : 31,541.32 = 20,962.24 : x
2. Step 2: Convert to fraction form
   21,152.05/31,541.32 = 20,962.24/x
3. Step 3: Cross multiply
   21,152.05x = 31,541.32 × 20,962.24
4. Step 4: Simplify right side
   21,152.05x = 661,176,719.76
5. Step 5: Solve for x
   x = 661,176,719.76/21,152.05
6. Step 6: Final answer
   x = 31,258.28