Finding the Fourth Proportional to 13,031.70, 17,985.69 and 10,904.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,031.70 : 17,985.69 = 10,904.10 : x
2. Step 2: Convert to fraction form
   13,031.70/17,985.69 = 10,904.10/x
3. Step 3: Cross multiply
   13,031.70x = 17,985.69 × 10,904.10
4. Step 4: Simplify right side
   13,031.70x = 196,117,762.33
5. Step 5: Solve for x
   x = 196,117,762.33/13,031.70
6. Step 6: Final answer
   x = 15,049.28