Finding the Fourth Proportional to 12,980.43, 17,902.80 and 9,395.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.43 : 17,902.80 = 9,395.91 : x
2. Step 2: Convert to fraction form
   12,980.43/17,902.80 = 9,395.91/x
3. Step 3: Cross multiply
   12,980.43x = 17,902.80 × 9,395.91
4. Step 4: Simplify right side
   12,980.43x = 168,213,096.30
5. Step 5: Solve for x
   x = 168,213,096.30/12,980.43
6. Step 6: Final answer
   x = 12,958.98