Finding the Fourth Proportional to 3,870.84, 5,341.59 and 2,102.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.84 : 5,341.59 = 2,102.40 : x
2. Step 2: Convert to fraction form
   3,870.84/5,341.59 = 2,102.40/x
3. Step 3: Cross multiply
   3,870.84x = 5,341.59 × 2,102.40
4. Step 4: Simplify right side
   3,870.84x = 11,230,158.82
5. Step 5: Solve for x
   x = 11,230,158.82/3,870.84
6. Step 6: Final answer
   x = 2,901.22