Finding the Fourth Proportional to 9,963.24, 13,749.55 and 5,487.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,963.24 : 13,749.55 = 5,487.30 : x
2. Step 2: Convert to fraction form
   9,963.24/13,749.55 = 5,487.30/x
3. Step 3: Cross multiply
   9,963.24x = 13,749.55 × 5,487.30
4. Step 4: Simplify right side
   9,963.24x = 75,447,905.72
5. Step 5: Solve for x
   x = 75,447,905.72/9,963.24
6. Step 6: Final answer
   x = 7,572.63