Finding the Fourth Proportional to 13,039.98, 17,995.05 and 7,071.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,039.98 : 17,995.05 = 7,071.78 : x
2. Step 2: Convert to fraction form
   13,039.98/17,995.05 = 7,071.78/x
3. Step 3: Cross multiply
   13,039.98x = 17,995.05 × 7,071.78
4. Step 4: Simplify right side
   13,039.98x = 127,257,034.69
5. Step 5: Solve for x
   x = 127,257,034.69/13,039.98
6. Step 6: Final answer
   x = 9,758.99