Finding the Fourth Proportional to 9,391.01, 12,959.60 and 5,412.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.01 : 12,959.60 = 5,412.12 : x
2. Step 2: Convert to fraction form
   9,391.01/12,959.60 = 5,412.12/x
3. Step 3: Cross multiply
   9,391.01x = 12,959.60 × 5,412.12
4. Step 4: Simplify right side
   9,391.01x = 70,138,834.69
5. Step 5: Solve for x
   x = 70,138,834.69/9,391.01
6. Step 6: Final answer
   x = 7,468.73