Finding the Fourth Proportional to 14,215.85, 21,342.25 and 10,931.25

Step by Step Solution

1. Step 1: Write the proportion equation
   14,215.85 : 21,342.25 = 10,931.25 : x
2. Step 2: Convert to fraction form
   14,215.85/21,342.25 = 10,931.25/x
3. Step 3: Cross multiply
   14,215.85x = 21,342.25 × 10,931.25
4. Step 4: Simplify right side
   14,215.85x = 233,297,443.96
5. Step 5: Solve for x
   x = 233,297,443.96/14,215.85
6. Step 6: Final answer
   x = 16,411.08