Finding the Fourth Proportional to 12,820.07, 17,691.62 and 7,442.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.07 : 17,691.62 = 7,442.08 : x
2. Step 2: Convert to fraction form
   12,820.07/17,691.62 = 7,442.08/x
3. Step 3: Cross multiply
   12,820.07x = 17,691.62 × 7,442.08
4. Step 4: Simplify right side
   12,820.07x = 131,662,369.93
5. Step 5: Solve for x
   x = 131,662,369.93/12,820.07
6. Step 6: Final answer
   x = 10,270.02