Finding the Fourth Proportional to 12,854.16, 17,736.72 and 7,477.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,854.16 : 17,736.72 = 7,477.79 : x
2. Step 2: Convert to fraction form
   12,854.16/17,736.72 = 7,477.79/x
3. Step 3: Cross multiply
   12,854.16x = 17,736.72 × 7,477.79
4. Step 4: Simplify right side
   12,854.16x = 132,631,467.45
5. Step 5: Solve for x
   x = 132,631,467.45/12,854.16
6. Step 6: Final answer
   x = 10,318.17