Finding the Fourth Proportional to 9,428.48, 13,010.60 and 5,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.48 : 13,010.60 = 5,449.50 : x
2. Step 2: Convert to fraction form
   9,428.48/13,010.60 = 5,449.50/x
3. Step 3: Cross multiply
   9,428.48x = 13,010.60 × 5,449.50
4. Step 4: Simplify right side
   9,428.48x = 70,901,299.59
5. Step 5: Solve for x
   x = 70,901,299.59/9,428.48
6. Step 6: Final answer
   x = 7,519.91