Finding the Fourth Proportional to 2,617.39, 3,920.89 and 1,577.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.39 : 3,920.89 = 1,577.67 : x
2. Step 2: Convert to fraction form
   2,617.39/3,920.89 = 1,577.67/x
3. Step 3: Cross multiply
   2,617.39x = 3,920.89 × 1,577.67
4. Step 4: Simplify right side
   2,617.39x = 6,185,870.53
5. Step 5: Solve for x
   x = 6,185,870.53/2,617.39
6. Step 6: Final answer
   x = 2,363.37