Finding the Fourth Proportional to 21,300.28, 31,953.17 and 7,256.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.28 : 31,953.17 = 7,256.51 : x
2. Step 2: Convert to fraction form
   21,300.28/31,953.17 = 7,256.51/x
3. Step 3: Cross multiply
   21,300.28x = 31,953.17 × 7,256.51
4. Step 4: Simplify right side
   21,300.28x = 231,868,555.50
5. Step 5: Solve for x
   x = 231,868,555.50/21,300.28
6. Step 6: Final answer
   x = 10,885.71