Finding the Fourth Proportional to 9,428.72, 13,010.18 and 5,449.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.72 : 13,010.18 = 5,449.06 : x
2. Step 2: Convert to fraction form
   9,428.72/13,010.18 = 5,449.06/x
3. Step 3: Cross multiply
   9,428.72x = 13,010.18 × 5,449.06
4. Step 4: Simplify right side
   9,428.72x = 70,893,291.53
5. Step 5: Solve for x
   x = 70,893,291.53/9,428.72
6. Step 6: Final answer
   x = 7,518.87