Finding the Fourth Proportional to 10,128.45, 13,976.59 and 6,351.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.45 : 13,976.59 = 6,351.46 : x
2. Step 2: Convert to fraction form
   10,128.45/13,976.59 = 6,351.46/x
3. Step 3: Cross multiply
   10,128.45x = 13,976.59 × 6,351.46
4. Step 4: Simplify right side
   10,128.45x = 88,771,752.32
5. Step 5: Solve for x
   x = 88,771,752.32/10,128.45
6. Step 6: Final answer
   x = 8,764.59