Finding the Fourth Proportional to 12,442.58, 17,192.62 and 9,945.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,442.58 : 17,192.62 = 9,945.30 : x
2. Step 2: Convert to fraction form
   12,442.58/17,192.62 = 9,945.30/x
3. Step 3: Cross multiply
   12,442.58x = 17,192.62 × 9,945.30
4. Step 4: Simplify right side
   12,442.58x = 170,985,763.69
5. Step 5: Solve for x
   x = 170,985,763.69/12,442.58
6. Step 6: Final answer
   x = 13,741.99