Finding the Fourth Proportional to 12,638.16, 17,440.62 and 7,336.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.16 : 17,440.62 = 7,336.08 : x
2. Step 2: Convert to fraction form
   12,638.16/17,440.62 = 7,336.08/x
3. Step 3: Cross multiply
   12,638.16x = 17,440.62 × 7,336.08
4. Step 4: Simplify right side
   12,638.16x = 127,945,783.57
5. Step 5: Solve for x
   x = 127,945,783.57/12,638.16
6. Step 6: Final answer
   x = 10,123.77