Finding the Fourth Proportional to 9,963.69, 13,749.71 and 5,487.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,963.69 : 13,749.71 = 5,487.35 : x
2. Step 2: Convert to fraction form
   9,963.69/13,749.71 = 5,487.35/x
3. Step 3: Cross multiply
   9,963.69x = 13,749.71 × 5,487.35
4. Step 4: Simplify right side
   9,963.69x = 75,449,374.98
5. Step 5: Solve for x
   x = 75,449,374.98/9,963.69
6. Step 6: Final answer
   x = 7,572.43