Finding the Fourth Proportional to 8,117.93, 12,178.72 and 2,570.85

Step by Step Solution

1. Step 1: Write the proportion equation
   8,117.93 : 12,178.72 = 2,570.85 : x
2. Step 2: Convert to fraction form
   8,117.93/12,178.72 = 2,570.85/x
3. Step 3: Cross multiply
   8,117.93x = 12,178.72 × 2,570.85
4. Step 4: Simplify right side
   8,117.93x = 31,309,662.31
5. Step 5: Solve for x
   x = 31,309,662.31/8,117.93
6. Step 6: Final answer
   x = 3,856.85