Finding the Fourth Proportional to 12,674.31, 17,490.42 and 7,009.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,674.31 : 17,490.42 = 7,009.30 : x
2. Step 2: Convert to fraction form
   12,674.31/17,490.42 = 7,009.30/x
3. Step 3: Cross multiply
   12,674.31x = 17,490.42 × 7,009.30
4. Step 4: Simplify right side
   12,674.31x = 122,595,600.91
5. Step 5: Solve for x
   x = 122,595,600.91/12,674.31
6. Step 6: Final answer
   x = 9,672.76