Finding the Fourth Proportional to 2,774.70, 4,162.50 and 1,388.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774.70 : 4,162.50 = 1,388.10 : x
2. Step 2: Convert to fraction form
   2,774.70/4,162.50 = 1,388.10/x
3. Step 3: Cross multiply
   2,774.70x = 4,162.50 × 1,388.10
4. Step 4: Simplify right side
   2,774.70x = 5,777,966.25
5. Step 5: Solve for x
   x = 5,777,966.25/2,774.70
6. Step 6: Final answer
   x = 2,082.38