Finding the Fourth Proportional to 21,215.50, 31,837.86 and 7,364.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,215.50 : 31,837.86 = 7,364.50 : x
2. Step 2: Convert to fraction form
   21,215.50/31,837.86 = 7,364.50/x
3. Step 3: Cross multiply
   21,215.50x = 31,837.86 × 7,364.50
4. Step 4: Simplify right side
   21,215.50x = 234,469,919.97
5. Step 5: Solve for x
   x = 234,469,919.97/21,215.50
6. Step 6: Final answer
   x = 11,051.82