Finding the Fourth Proportional to 9,609.31, 13,259.32 and 5,416.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,609.31 : 13,259.32 = 5,416.75 : x
2. Step 2: Convert to fraction form
   9,609.31/13,259.32 = 5,416.75/x
3. Step 3: Cross multiply
   9,609.31x = 13,259.32 × 5,416.75
4. Step 4: Simplify right side
   9,609.31x = 71,822,421.61
5. Step 5: Solve for x
   x = 71,822,421.61/9,609.31
6. Step 6: Final answer
   x = 7,474.25