Finding the Fourth Proportional to 2,134.87, 2,944.27 and 1,388.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,134.87 : 2,944.27 = 1,388.55 : x
2. Step 2: Convert to fraction form
   2,134.87/2,944.27 = 1,388.55/x
3. Step 3: Cross multiply
   2,134.87x = 2,944.27 × 1,388.55
4. Step 4: Simplify right side
   2,134.87x = 4,088,262.64
5. Step 5: Solve for x
   x = 4,088,262.64/2,134.87
6. Step 6: Final answer
   x = 1,915.00