Finding the Fourth Proportional to 10,128.58, 13,946.25 and 8,633.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.58 : 13,946.25 = 8,633.14 : x
2. Step 2: Convert to fraction form
   10,128.58/13,946.25 = 8,633.14/x
3. Step 3: Cross multiply
   10,128.58x = 13,946.25 × 8,633.14
4. Step 4: Simplify right side
   10,128.58x = 120,399,928.73
5. Step 5: Solve for x
   x = 120,399,928.73/10,128.58
6. Step 6: Final answer
   x = 11,887.15