Finding the Fourth Proportional to 10,128.26, 13,977.75 and 5,880.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.26 : 13,977.75 = 5,880.78 : x
2. Step 2: Convert to fraction form
   10,128.26/13,977.75 = 5,880.78/x
3. Step 3: Cross multiply
   10,128.26x = 13,977.75 × 5,880.78
4. Step 4: Simplify right side
   10,128.26x = 82,200,072.65
5. Step 5: Solve for x
   x = 82,200,072.65/10,128.26
6. Step 6: Final answer
   x = 8,115.92