Finding the Fourth Proportional to 13,039.76, 17,994.72 and 7,071.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,039.76 : 17,994.72 = 7,071.32 : x
2. Step 2: Convert to fraction form
   13,039.76/17,994.72 = 7,071.32/x
3. Step 3: Cross multiply
   13,039.76x = 17,994.72 × 7,071.32
4. Step 4: Simplify right side
   13,039.76x = 127,246,423.43
5. Step 5: Solve for x
   x = 127,246,423.43/13,039.76
6. Step 6: Final answer
   x = 9,758.34