Finding the Fourth Proportional to 9,963.77, 13,749.89 and 5,487.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,963.77 : 13,749.89 = 5,487.42 : x
2. Step 2: Convert to fraction form
   9,963.77/13,749.89 = 5,487.42/x
3. Step 3: Cross multiply
   9,963.77x = 13,749.89 × 5,487.42
4. Step 4: Simplify right side
   9,963.77x = 75,451,445.51
5. Step 5: Solve for x
   x = 75,451,445.51/9,963.77
6. Step 6: Final answer
   x = 7,572.58