Finding the Fourth Proportional to 10,608.42, 15,897.56 and 7,813.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,608.42 : 15,897.56 = 7,813.16 : x
2. Step 2: Convert to fraction form
   10,608.42/15,897.56 = 7,813.16/x
3. Step 3: Cross multiply
   10,608.42x = 15,897.56 × 7,813.16
4. Step 4: Simplify right side
   10,608.42x = 124,210,179.89
5. Step 5: Solve for x
   x = 124,210,179.89/10,608.42
6. Step 6: Final answer
   x = 11,708.64