Finding the Fourth Proportional to 12,793.41, 17,654.58 and 7,128.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,793.41 : 17,654.58 = 7,128.18 : x
2. Step 2: Convert to fraction form
   12,793.41/17,654.58 = 7,128.18/x
3. Step 3: Cross multiply
   12,793.41x = 17,654.58 × 7,128.18
4. Step 4: Simplify right side
   12,793.41x = 125,845,024.06
5. Step 5: Solve for x
   x = 125,845,024.06/12,793.41
6. Step 6: Final answer
   x = 9,836.71