Finding the Fourth Proportional to 9,962.78, 13,748.74 and 5,486.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,962.78 : 13,748.74 = 5,486.67 : x
2. Step 2: Convert to fraction form
   9,962.78/13,748.74 = 5,486.67/x
3. Step 3: Cross multiply
   9,962.78x = 13,748.74 × 5,486.67
4. Step 4: Simplify right side
   9,962.78x = 75,434,771.86
5. Step 5: Solve for x
   x = 75,434,771.86/9,962.78
6. Step 6: Final answer
   x = 7,571.66