Finding the Fourth Proportional to 12,478.26, 17,219.52 and 7,442.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.26 : 17,219.52 = 7,442.37 : x
2. Step 2: Convert to fraction form
   12,478.26/17,219.52 = 7,442.37/x
3. Step 3: Cross multiply
   12,478.26x = 17,219.52 × 7,442.37
4. Step 4: Simplify right side
   12,478.26x = 128,154,039.06
5. Step 5: Solve for x
   x = 128,154,039.06/12,478.26
6. Step 6: Final answer
   x = 10,270.19