Finding the Fourth Proportional to 9,400.83, 12,974.52 and 5,421.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.83 : 12,974.52 = 5,421.16 : x
2. Step 2: Convert to fraction form
   9,400.83/12,974.52 = 5,421.16/x
3. Step 3: Cross multiply
   9,400.83x = 12,974.52 × 5,421.16
4. Step 4: Simplify right side
   9,400.83x = 70,336,948.84
5. Step 5: Solve for x
   x = 70,336,948.84/9,400.83
6. Step 6: Final answer
   x = 7,481.99