Finding the Fourth Proportional to 12,830.18, 17,706.56 and 7,166.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,830.18 : 17,706.56 = 7,166.03 : x
2. Step 2: Convert to fraction form
   12,830.18/17,706.56 = 7,166.03/x
3. Step 3: Cross multiply
   12,830.18x = 17,706.56 × 7,166.03
4. Step 4: Simplify right side
   12,830.18x = 126,885,615.79
5. Step 5: Solve for x
   x = 126,885,615.79/12,830.18
6. Step 6: Final answer
   x = 9,889.62