Finding the Fourth Proportional to 12,374.78, 17,078.65 and 7,071.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,374.78 : 17,078.65 = 7,071.30 : x
2. Step 2: Convert to fraction form
   12,374.78/17,078.65 = 7,071.30/x
3. Step 3: Cross multiply
   12,374.78x = 17,078.65 × 7,071.30
4. Step 4: Simplify right side
   12,374.78x = 120,768,240.07
5. Step 5: Solve for x
   x = 120,768,240.07/12,374.78
6. Step 6: Final answer
   x = 9,759.23