Finding the Fourth Proportional to 9,354.04, 12,906.78 and 5,628.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,354.04 : 12,906.78 = 5,628.28 : x
2. Step 2: Convert to fraction form
   9,354.04/12,906.78 = 5,628.28/x
3. Step 3: Cross multiply
   9,354.04x = 12,906.78 × 5,628.28
4. Step 4: Simplify right side
   9,354.04x = 72,642,971.74
5. Step 5: Solve for x
   x = 72,642,971.74/9,354.04
6. Step 6: Final answer
   x = 7,765.95