Finding the Fourth Proportional to 9,721.29, 13,415.46 and 5,529.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.29 : 13,415.46 = 5,529.81 : x
2. Step 2: Convert to fraction form
   9,721.29/13,415.46 = 5,529.81/x
3. Step 3: Cross multiply
   9,721.29x = 13,415.46 × 5,529.81
4. Step 4: Simplify right side
   9,721.29x = 74,184,944.86
5. Step 5: Solve for x
   x = 74,184,944.86/9,721.29
6. Step 6: Final answer
   x = 7,631.18