Finding the Fourth Proportional to 9,620.96, 13,273.98 and 5,587.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.96 : 13,273.98 = 5,587.40 : x
2. Step 2: Convert to fraction form
   9,620.96/13,273.98 = 5,587.40/x
3. Step 3: Cross multiply
   9,620.96x = 13,273.98 × 5,587.40
4. Step 4: Simplify right side
   9,620.96x = 74,167,035.85
5. Step 5: Solve for x
   x = 74,167,035.85/9,620.96
6. Step 6: Final answer
   x = 7,708.90