Finding the Fourth Proportional to 6,837.16, 10,247.78 and 3,139.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,837.16 : 10,247.78 = 3,139.78 : x
2. Step 2: Convert to fraction form
   6,837.16/10,247.78 = 3,139.78/x
3. Step 3: Cross multiply
   6,837.16x = 10,247.78 × 3,139.78
4. Step 4: Simplify right side
   6,837.16x = 32,175,774.69
5. Step 5: Solve for x
   x = 32,175,774.69/6,837.16
6. Step 6: Final answer
   x = 4,706.01