Finding the Fourth Proportional to 8,978.31, 13,448.93 and 5,269.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.31 : 13,448.93 = 5,269.38 : x
2. Step 2: Convert to fraction form
   8,978.31/13,448.93 = 5,269.38/x
3. Step 3: Cross multiply
   8,978.31x = 13,448.93 × 5,269.38
4. Step 4: Simplify right side
   8,978.31x = 70,867,496.42
5. Step 5: Solve for x
   x = 70,867,496.42/8,978.31
6. Step 6: Final answer
   x = 7,893.19