Finding the Fourth Proportional to 3,870.30, 5,345.40 and 2,609.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.30 : 5,345.40 = 2,609.17 : x
2. Step 2: Convert to fraction form
   3,870.30/5,345.40 = 2,609.17/x
3. Step 3: Cross multiply
   3,870.30x = 5,345.40 × 2,609.17
4. Step 4: Simplify right side
   3,870.30x = 13,947,057.32
5. Step 5: Solve for x
   x = 13,947,057.32/3,870.30
6. Step 6: Final answer
   x = 3,603.62