Finding the Fourth Proportional to 9,963.51, 13,749.89 and 5,487.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,963.51 : 13,749.89 = 5,487.41 : x
2. Step 2: Convert to fraction form
   9,963.51/13,749.89 = 5,487.41/x
3. Step 3: Cross multiply
   9,963.51x = 13,749.89 × 5,487.41
4. Step 4: Simplify right side
   9,963.51x = 75,451,187.70
5. Step 5: Solve for x
   x = 75,451,187.70/9,963.51
6. Step 6: Final answer
   x = 7,572.75