Finding the Fourth Proportional to 21,256.54, 31,871.13 and 10,162.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,256.54 : 31,871.13 = 10,162.98 : x
2. Step 2: Convert to fraction form
   21,256.54/31,871.13 = 10,162.98/x
3. Step 3: Cross multiply
   21,256.54x = 31,871.13 × 10,162.98
4. Step 4: Simplify right side
   21,256.54x = 323,905,656.77
5. Step 5: Solve for x
   x = 323,905,656.77/21,256.54
6. Step 6: Final answer
   x = 15,237.93