Finding the Fourth Proportional to 3,870.11, 5,345.18 and 2,549.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.11 : 5,345.18 = 2,549.71 : x
2. Step 2: Convert to fraction form
   3,870.11/5,345.18 = 2,549.71/x
3. Step 3: Cross multiply
   3,870.11x = 5,345.18 × 2,549.71
4. Step 4: Simplify right side
   3,870.11x = 13,628,658.90
5. Step 5: Solve for x
   x = 13,628,658.90/3,870.11
6. Step 6: Final answer
   x = 3,521.52