Finding the Fourth Proportional to 3,870.54, 5,341.36 and 2,102.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.54 : 5,341.36 = 2,102.16 : x
2. Step 2: Convert to fraction form
   3,870.54/5,341.36 = 2,102.16/x
3. Step 3: Cross multiply
   3,870.54x = 5,341.36 × 2,102.16
4. Step 4: Simplify right side
   3,870.54x = 11,228,393.34
5. Step 5: Solve for x
   x = 11,228,393.34/3,870.54
6. Step 6: Final answer
   x = 2,900.99