Finding the Fourth Proportional to 9,400.24, 12,971.96 and 5,621.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.24 : 12,971.96 = 5,621.18 : x
2. Step 2: Convert to fraction form
   9,400.24/12,971.96 = 5,621.18/x
3. Step 3: Cross multiply
   9,400.24x = 12,971.96 × 5,621.18
4. Step 4: Simplify right side
   9,400.24x = 72,917,707.38
5. Step 5: Solve for x
   x = 72,917,707.38/9,400.24
6. Step 6: Final answer
   x = 7,757.00