Finding the Fourth Proportional to 9,904.76, 13,668.59 and 5,428.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,904.76 : 13,668.59 = 5,428.67 : x
2. Step 2: Convert to fraction form
   9,904.76/13,668.59 = 5,428.67/x
3. Step 3: Cross multiply
   9,904.76x = 13,668.59 × 5,428.67
4. Step 4: Simplify right side
   9,904.76x = 74,202,271.50
5. Step 5: Solve for x
   x = 74,202,271.50/9,904.76
6. Step 6: Final answer
   x = 7,491.58