Finding the Fourth Proportional to 11,815.42, 17,698.83 and 8,535.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,815.42 : 17,698.83 = 8,535.10 : x
2. Step 2: Convert to fraction form
   11,815.42/17,698.83 = 8,535.10/x
3. Step 3: Cross multiply
   11,815.42x = 17,698.83 × 8,535.10
4. Step 4: Simplify right side
   11,815.42x = 151,061,283.93
5. Step 5: Solve for x
   x = 151,061,283.93/11,815.42
6. Step 6: Final answer
   x = 12,785.10