Finding the Fourth Proportional to 3,870.17, 5,340.59 and 2,191.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.17 : 5,340.59 = 2,191.92 : x
2. Step 2: Convert to fraction form
   3,870.17/5,340.59 = 2,191.92/x
3. Step 3: Cross multiply
   3,870.17x = 5,340.59 × 2,191.92
4. Step 4: Simplify right side
   3,870.17x = 11,706,146.03
5. Step 5: Solve for x
   x = 11,706,146.03/3,870.17
6. Step 6: Final answer
   x = 3,024.71