Finding the Fourth Proportional to 12,830.38, 17,705.59 and 7,164.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,830.38 : 17,705.59 = 7,164.97 : x
2. Step 2: Convert to fraction form
   12,830.38/17,705.59 = 7,164.97/x
3. Step 3: Cross multiply
   12,830.38x = 17,705.59 × 7,164.97
4. Step 4: Simplify right side
   12,830.38x = 126,860,058.60
5. Step 5: Solve for x
   x = 126,860,058.60/12,830.38
6. Step 6: Final answer
   x = 9,887.47