Finding the Fourth Proportional to 9,436.78, 13,020.90 and 5,404.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,436.78 : 13,020.90 = 5,404.84 : x
2. Step 2: Convert to fraction form
   9,436.78/13,020.90 = 5,404.84/x
3. Step 3: Cross multiply
   9,436.78x = 13,020.90 × 5,404.84
4. Step 4: Simplify right side
   9,436.78x = 70,375,881.16
5. Step 5: Solve for x
   x = 70,375,881.16/9,436.78
6. Step 6: Final answer
   x = 7,457.62