Finding the Fourth Proportional to 9,963.54, 13,749.95 and 5,487.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,963.54 : 13,749.95 = 5,487.57 : x
2. Step 2: Convert to fraction form
   9,963.54/13,749.95 = 5,487.57/x
3. Step 3: Cross multiply
   9,963.54x = 13,749.95 × 5,487.57
4. Step 4: Simplify right side
   9,963.54x = 75,453,826.84
5. Step 5: Solve for x
   x = 75,453,826.84/9,963.54
6. Step 6: Final answer
   x = 7,572.99