Finding the Fourth Proportional to 12,792.41, 17,654.82 and 7,128.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,792.41 : 17,654.82 = 7,128.08 : x
2. Step 2: Convert to fraction form
   12,792.41/17,654.82 = 7,128.08/x
3. Step 3: Cross multiply
   12,792.41x = 17,654.82 × 7,128.08
4. Step 4: Simplify right side
   12,792.41x = 125,844,920.55
5. Step 5: Solve for x
   x = 125,844,920.55/12,792.41
6. Step 6: Final answer
   x = 9,837.47