Finding the Fourth Proportional to 9,434.94, 13,019.13 and 5,457.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,434.94 : 13,019.13 = 5,457.30 : x
2. Step 2: Convert to fraction form
   9,434.94/13,019.13 = 5,457.30/x
3. Step 3: Cross multiply
   9,434.94x = 13,019.13 × 5,457.30
4. Step 4: Simplify right side
   9,434.94x = 71,049,298.15
5. Step 5: Solve for x
   x = 71,049,298.15/9,434.94
6. Step 6: Final answer
   x = 7,530.45