Finding the Fourth Proportional to 12,665.31, 17,478.05 and 7,000.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.31 : 17,478.05 = 7,000.44 : x
2. Step 2: Convert to fraction form
   12,665.31/17,478.05 = 7,000.44/x
3. Step 3: Cross multiply
   12,665.31x = 17,478.05 × 7,000.44
4. Step 4: Simplify right side
   12,665.31x = 122,354,005.34
5. Step 5: Solve for x
   x = 122,354,005.34/12,665.31
6. Step 6: Final answer
   x = 9,660.56