Finding the Fourth Proportional to 12,810.42, 17,678.25 and 8,098.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,810.42 : 17,678.25 = 8,098.58 : x
2. Step 2: Convert to fraction form
   12,810.42/17,678.25 = 8,098.58/x
3. Step 3: Cross multiply
   12,810.42x = 17,678.25 × 8,098.58
4. Step 4: Simplify right side
   12,810.42x = 143,168,721.89
5. Step 5: Solve for x
   x = 143,168,721.89/12,810.42
6. Step 6: Final answer
   x = 11,175.96