Finding the Fourth Proportional to 10,128.34, 13,979.97 and 5,880.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.34 : 13,979.97 = 5,880.32 : x
2. Step 2: Convert to fraction form
   10,128.34/13,979.97 = 5,880.32/x
3. Step 3: Cross multiply
   10,128.34x = 13,979.97 × 5,880.32
4. Step 4: Simplify right side
   10,128.34x = 82,206,702.50
5. Step 5: Solve for x
   x = 82,206,702.50/10,128.34
6. Step 6: Final answer
   x = 8,116.50