Finding the Fourth Proportional to 3,870.36, 5,340.92 and 2,191.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.36 : 5,340.92 = 2,191.76 : x
2. Step 2: Convert to fraction form
   3,870.36/5,340.92 = 2,191.76/x
3. Step 3: Cross multiply
   3,870.36x = 5,340.92 × 2,191.76
4. Step 4: Simplify right side
   3,870.36x = 11,706,014.82
5. Step 5: Solve for x
   x = 11,706,014.82/3,870.36
6. Step 6: Final answer
   x = 3,024.53