Finding the Fourth Proportional to 12,405.48, 17,112.42 and 7,434.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,405.48 : 17,112.42 = 7,434.60 : x
2. Step 2: Convert to fraction form
   12,405.48/17,112.42 = 7,434.60/x
3. Step 3: Cross multiply
   12,405.48x = 17,112.42 × 7,434.60
4. Step 4: Simplify right side
   12,405.48x = 127,223,997.73
5. Step 5: Solve for x
   x = 127,223,997.73/12,405.48
6. Step 6: Final answer
   x = 10,255.47