Finding the Fourth Proportional to 13,103.89, 18,080.97 and 7,438.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.89 : 18,080.97 = 7,438.87 : x
2. Step 2: Convert to fraction form
   13,103.89/18,080.97 = 7,438.87/x
3. Step 3: Cross multiply
   13,103.89x = 18,080.97 × 7,438.87
4. Step 4: Simplify right side
   13,103.89x = 134,501,985.30
5. Step 5: Solve for x
   x = 134,501,985.30/13,103.89
6. Step 6: Final answer
   x = 10,264.28