Finding the Fourth Proportional to 3,870.61, 5,341.47 and 2,102.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.61 : 5,341.47 = 2,102.25 : x
2. Step 2: Convert to fraction form
   3,870.61/5,341.47 = 2,102.25/x
3. Step 3: Cross multiply
   3,870.61x = 5,341.47 × 2,102.25
4. Step 4: Simplify right side
   3,870.61x = 11,229,105.31
5. Step 5: Solve for x
   x = 11,229,105.31/3,870.61
6. Step 6: Final answer
   x = 2,901.12