Finding the Fourth Proportional to 3,870.23, 5,340.89 and 2,101.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.23 : 5,340.89 = 2,101.82 : x
2. Step 2: Convert to fraction form
   3,870.23/5,340.89 = 2,101.82/x
3. Step 3: Cross multiply
   3,870.23x = 5,340.89 × 2,101.82
4. Step 4: Simplify right side
   3,870.23x = 11,225,567.97
5. Step 5: Solve for x
   x = 11,225,567.97/3,870.23
6. Step 6: Final answer
   x = 2,900.49