Finding the Fourth Proportional to 2,558.76, 3,838.86 and 1,388.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.76 : 3,838.86 = 1,388.52 : x
2. Step 2: Convert to fraction form
   2,558.76/3,838.86 = 1,388.52/x
3. Step 3: Cross multiply
   2,558.76x = 3,838.86 × 1,388.52
4. Step 4: Simplify right side
   2,558.76x = 5,330,333.89
5. Step 5: Solve for x
   x = 5,330,333.89/2,558.76
6. Step 6: Final answer
   x = 2,083.17