Finding the Fourth Proportional to 9,962.63, 13,748.53 and 5,486.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,962.63 : 13,748.53 = 5,486.55 : x
2. Step 2: Convert to fraction form
   9,962.63/13,748.53 = 5,486.55/x
3. Step 3: Cross multiply
   9,962.63x = 13,748.53 × 5,486.55
4. Step 4: Simplify right side
   9,962.63x = 75,431,997.27
5. Step 5: Solve for x
   x = 75,431,997.27/9,962.63
6. Step 6: Final answer
   x = 7,571.49