Finding the Fourth Proportional to 9,613.64, 13,262.10 and 7,485.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,613.64 : 13,262.10 = 7,485.39 : x
2. Step 2: Convert to fraction form
   9,613.64/13,262.10 = 7,485.39/x
3. Step 3: Cross multiply
   9,613.64x = 13,262.10 × 7,485.39
4. Step 4: Simplify right side
   9,613.64x = 99,271,990.72
5. Step 5: Solve for x
   x = 99,271,990.72/9,613.64
6. Step 6: Final answer
   x = 10,326.17