Finding the Fourth Proportional to 9,915, 13,682.70 and 5,499

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915 : 13,682.70 = 5,499 : x
2. Step 2: Convert to fraction form
   9,915/13,682.70 = 5,499/x
3. Step 3: Cross multiply
   9,915x = 13,682.70 × 5,499
4. Step 4: Simplify right side
   9,915x = 75,241,167.30
5. Step 5: Solve for x
   x = 75,241,167.30/9,915
6. Step 6: Final answer
   x = 7,588.62