Finding the Fourth Proportional to 9,721.82, 13,416.06 and 5,530.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.82 : 13,416.06 = 5,530.10 : x
2. Step 2: Convert to fraction form
   9,721.82/13,416.06 = 5,530.10/x
3. Step 3: Cross multiply
   9,721.82x = 13,416.06 × 5,530.10
4. Step 4: Simplify right side
   9,721.82x = 74,192,153.41
5. Step 5: Solve for x
   x = 74,192,153.41/9,721.82
6. Step 6: Final answer
   x = 7,631.51