Finding the Fourth Proportional to 9,404.12, 12,976.80 and 5,212.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.12 : 12,976.80 = 5,212.28 : x
2. Step 2: Convert to fraction form
   9,404.12/12,976.80 = 5,212.28/x
3. Step 3: Cross multiply
   9,404.12x = 12,976.80 × 5,212.28
4. Step 4: Simplify right side
   9,404.12x = 67,638,715.10
5. Step 5: Solve for x
   x = 67,638,715.10/9,404.12
6. Step 6: Final answer
   x = 7,192.46