Finding the Fourth Proportional to 9,613.78, 13,268.32 and 5,636.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,613.78 : 13,268.32 = 5,636.48 : x
2. Step 2: Convert to fraction form
   9,613.78/13,268.32 = 5,636.48/x
3. Step 3: Cross multiply
   9,613.78x = 13,268.32 × 5,636.48
4. Step 4: Simplify right side
   9,613.78x = 74,786,620.31
5. Step 5: Solve for x
   x = 74,786,620.31/9,613.78
6. Step 6: Final answer
   x = 7,779.11