Finding the Fourth Proportional to 2,178.16, 3,006.33 and 1,339.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.16 : 3,006.33 = 1,339.57 : x
2. Step 2: Convert to fraction form
   2,178.16/3,006.33 = 1,339.57/x
3. Step 3: Cross multiply
   2,178.16x = 3,006.33 × 1,339.57
4. Step 4: Simplify right side
   2,178.16x = 4,027,188.21
5. Step 5: Solve for x
   x = 4,027,188.21/2,178.16
6. Step 6: Final answer
   x = 1,848.90