Finding the Fourth Proportional to 9,940.72, 13,718.91 and 5,961.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,940.72 : 13,718.91 = 5,961.76 : x
2. Step 2: Convert to fraction form
   9,940.72/13,718.91 = 5,961.76/x
3. Step 3: Cross multiply
   9,940.72x = 13,718.91 × 5,961.76
4. Step 4: Simplify right side
   9,940.72x = 81,788,848.88
5. Step 5: Solve for x
   x = 81,788,848.88/9,940.72
6. Step 6: Final answer
   x = 8,227.66