Finding the Fourth Proportional to 3,870.03, 5,340.78 and 2,191.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.03 : 5,340.78 = 2,191.53 : x
2. Step 2: Convert to fraction form
   3,870.03/5,340.78 = 2,191.53/x
3. Step 3: Cross multiply
   3,870.03x = 5,340.78 × 2,191.53
4. Step 4: Simplify right side
   3,870.03x = 11,704,479.59
5. Step 5: Solve for x
   x = 11,704,479.59/3,870.03
6. Step 6: Final answer
   x = 3,024.39