Finding the Fourth Proportional to 13,013.57, 17,958.70 and 7,045.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,013.57 : 17,958.70 = 7,045.34 : x
2. Step 2: Convert to fraction form
   13,013.57/17,958.70 = 7,045.34/x
3. Step 3: Cross multiply
   13,013.57x = 17,958.70 × 7,045.34
4. Step 4: Simplify right side
   13,013.57x = 126,525,147.46
5. Step 5: Solve for x
   x = 126,525,147.46/13,013.57
6. Step 6: Final answer
   x = 9,722.55