Finding the Fourth Proportional to 3,870.25, 5,340.97 and 2,101.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.25 : 5,340.97 = 2,101.86 : x
2. Step 2: Convert to fraction form
   3,870.25/5,340.97 = 2,101.86/x
3. Step 3: Cross multiply
   3,870.25x = 5,340.97 × 2,101.86
4. Step 4: Simplify right side
   3,870.25x = 11,225,973.83
5. Step 5: Solve for x
   x = 11,225,973.83/3,870.25
6. Step 6: Final answer
   x = 2,900.58