Finding the Fourth Proportional to 12,426.54, 17,148.12 and 7,120.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.54 : 17,148.12 = 7,120.34 : x
2. Step 2: Convert to fraction form
   12,426.54/17,148.12 = 7,120.34/x
3. Step 3: Cross multiply
   12,426.54x = 17,148.12 × 7,120.34
4. Step 4: Simplify right side
   12,426.54x = 122,100,359.02
5. Step 5: Solve for x
   x = 122,100,359.02/12,426.54
6. Step 6: Final answer
   x = 9,825.77