Finding the Fourth Proportional to 9,326.05, 12,869.91 and 5,134.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,326.05 : 12,869.91 = 5,134.30 : x
2. Step 2: Convert to fraction form
   9,326.05/12,869.91 = 5,134.30/x
3. Step 3: Cross multiply
   9,326.05x = 12,869.91 × 5,134.30
4. Step 4: Simplify right side
   9,326.05x = 66,077,978.91
5. Step 5: Solve for x
   x = 66,077,978.91/9,326.05
6. Step 6: Final answer
   x = 7,085.31