Finding the Fourth Proportional to 8,570.94, 12,838.18 and 5,057.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.94 : 12,838.18 = 5,057.16 : x
2. Step 2: Convert to fraction form
   8,570.94/12,838.18 = 5,057.16/x
3. Step 3: Cross multiply
   8,570.94x = 12,838.18 × 5,057.16
4. Step 4: Simplify right side
   8,570.94x = 64,924,730.37
5. Step 5: Solve for x
   x = 64,924,730.37/8,570.94
6. Step 6: Final answer
   x = 7,574.98