Finding the Fourth Proportional to 12,574.56, 17,336.88 and 7,857.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,574.56 : 17,336.88 = 7,857.12 : x
2. Step 2: Convert to fraction form
   12,574.56/17,336.88 = 7,857.12/x
3. Step 3: Cross multiply
   12,574.56x = 17,336.88 × 7,857.12
4. Step 4: Simplify right side
   12,574.56x = 136,217,946.59
5. Step 5: Solve for x
   x = 136,217,946.59/12,574.56
6. Step 6: Final answer
   x = 10,832.82