Finding the Fourth Proportional to 9,857.32, 13,608.42 and 7,836.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,857.32 : 13,608.42 = 7,836.76 : x
2. Step 2: Convert to fraction form
   9,857.32/13,608.42 = 7,836.76/x
3. Step 3: Cross multiply
   9,857.32x = 13,608.42 × 7,836.76
4. Step 4: Simplify right side
   9,857.32x = 106,645,921.52
5. Step 5: Solve for x
   x = 106,645,921.52/9,857.32
6. Step 6: Final answer
   x = 10,818.96