Finding the Fourth Proportional to 9,270.15, 12,790.53 and 5,494.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,270.15 : 12,790.53 = 5,494.21 : x
2. Step 2: Convert to fraction form
   9,270.15/12,790.53 = 5,494.21/x
3. Step 3: Cross multiply
   9,270.15x = 12,790.53 × 5,494.21
4. Step 4: Simplify right side
   9,270.15x = 70,273,886.27
5. Step 5: Solve for x
   x = 70,273,886.27/9,270.15
6. Step 6: Final answer
   x = 7,580.67