Finding the Fourth Proportional to 9,381.75, 12,945.69 and 5,404.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,381.75 : 12,945.69 = 5,404.16 : x
2. Step 2: Convert to fraction form
   9,381.75/12,945.69 = 5,404.16/x
3. Step 3: Cross multiply
   9,381.75x = 12,945.69 × 5,404.16
4. Step 4: Simplify right side
   9,381.75x = 69,960,515.34
5. Step 5: Solve for x
   x = 69,960,515.34/9,381.75
6. Step 6: Final answer
   x = 7,457.09