Finding the Fourth Proportional to 9,429.51, 13,009.79 and 5,449.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,429.51 : 13,009.79 = 5,449.17 : x
2. Step 2: Convert to fraction form
   9,429.51/13,009.79 = 5,449.17/x
3. Step 3: Cross multiply
   9,429.51x = 13,009.79 × 5,449.17
4. Step 4: Simplify right side
   9,429.51x = 70,892,557.37
5. Step 5: Solve for x
   x = 70,892,557.37/9,429.51
6. Step 6: Final answer
   x = 7,518.16