Finding the Fourth Proportional to 5,857.68, 8,085.48 and 3,870

Step by Step Solution

1. Step 1: Write the proportion equation
   5,857.68 : 8,085.48 = 3,870 : x
2. Step 2: Convert to fraction form
   5,857.68/8,085.48 = 3,870/x
3. Step 3: Cross multiply
   5,857.68x = 8,085.48 × 3,870
4. Step 4: Simplify right side
   5,857.68x = 31,290,807.60
5. Step 5: Solve for x
   x = 31,290,807.60/5,857.68
6. Step 6: Final answer
   x = 5,341.84