Finding the Fourth Proportional to 5,156.38, 7,118.04 and 3,975.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,156.38 : 7,118.04 = 3,975.40 : x
2. Step 2: Convert to fraction form
   5,156.38/7,118.04 = 3,975.40/x
3. Step 3: Cross multiply
   5,156.38x = 7,118.04 × 3,975.40
4. Step 4: Simplify right side
   5,156.38x = 28,297,056.22
5. Step 5: Solve for x
   x = 28,297,056.22/5,156.38
6. Step 6: Final answer
   x = 5,487.78