Finding the Fourth Proportional to 12,439.02, 17,164.62 and 7,401.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.02 : 17,164.62 = 7,401.63 : x
2. Step 2: Convert to fraction form
   12,439.02/17,164.62 = 7,401.63/x
3. Step 3: Cross multiply
   12,439.02x = 17,164.62 × 7,401.63
4. Step 4: Simplify right side
   12,439.02x = 127,046,166.33
5. Step 5: Solve for x
   x = 127,046,166.33/12,439.02
6. Step 6: Final answer
   x = 10,213.52