Finding the Fourth Proportional to 2,051.45, 3,077.15 and 1,391.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.45 : 3,077.15 = 1,391.69 : x
2. Step 2: Convert to fraction form
   2,051.45/3,077.15 = 1,391.69/x
3. Step 3: Cross multiply
   2,051.45x = 3,077.15 × 1,391.69
4. Step 4: Simplify right side
   2,051.45x = 4,282,429.85
5. Step 5: Solve for x
   x = 4,282,429.85/2,051.45
6. Step 6: Final answer
   x = 2,087.51