Finding the Fourth Proportional to 9,628.78, 13,287.09 and 5,437.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,628.78 : 13,287.09 = 5,437.30 : x
2. Step 2: Convert to fraction form
   9,628.78/13,287.09 = 5,437.30/x
3. Step 3: Cross multiply
   9,628.78x = 13,287.09 × 5,437.30
4. Step 4: Simplify right side
   9,628.78x = 72,245,894.46
5. Step 5: Solve for x
   x = 72,245,894.46/9,628.78
6. Step 6: Final answer
   x = 7,503.12