Finding the Fourth Proportional to 2,127.59, 2,936.14 and 1,288.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.59 : 2,936.14 = 1,288.45 : x
2. Step 2: Convert to fraction form
   2,127.59/2,936.14 = 1,288.45/x
3. Step 3: Cross multiply
   2,127.59x = 2,936.14 × 1,288.45
4. Step 4: Simplify right side
   2,127.59x = 3,783,069.58
5. Step 5: Solve for x
   x = 3,783,069.58/2,127.59
6. Step 6: Final answer
   x = 1,778.10