Finding the Fourth Proportional to 2,184.38, 3,013.46 and 1,388.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,184.38 : 3,013.46 = 1,388.76 : x
2. Step 2: Convert to fraction form
   2,184.38/3,013.46 = 1,388.76/x
3. Step 3: Cross multiply
   2,184.38x = 3,013.46 × 1,388.76
4. Step 4: Simplify right side
   2,184.38x = 4,184,972.71
5. Step 5: Solve for x
   x = 4,184,972.71/2,184.38
6. Step 6: Final answer
   x = 1,915.86