Finding the Fourth Proportional to 9,962.89, 13,748.87 and 5,486.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,962.89 : 13,748.87 = 5,486.79 : x
2. Step 2: Convert to fraction form
   9,962.89/13,748.87 = 5,486.79/x
3. Step 3: Cross multiply
   9,962.89x = 13,748.87 × 5,486.79
4. Step 4: Simplify right side
   9,962.89x = 75,437,227.70
5. Step 5: Solve for x
   x = 75,437,227.70/9,962.89
6. Step 6: Final answer
   x = 7,571.82