Finding the Fourth Proportional to 9,620.78, 13,276.54 and 5,371.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.78 : 13,276.54 = 5,371.62 : x
2. Step 2: Convert to fraction form
   9,620.78/13,276.54 = 5,371.62/x
3. Step 3: Cross multiply
   9,620.78x = 13,276.54 × 5,371.62
4. Step 4: Simplify right side
   9,620.78x = 71,316,527.79
5. Step 5: Solve for x
   x = 71,316,527.79/9,620.78
6. Step 6: Final answer
   x = 7,412.76