Finding the Fourth Proportional to 2,382.70, 3,288.18 and 1,388.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.70 : 3,288.18 = 1,388.02 : x
2. Step 2: Convert to fraction form
   2,382.70/3,288.18 = 1,388.02/x
3. Step 3: Cross multiply
   2,382.70x = 3,288.18 × 1,388.02
4. Step 4: Simplify right side
   2,382.70x = 4,564,059.60
5. Step 5: Solve for x
   x = 4,564,059.60/2,382.70
6. Step 6: Final answer
   x = 1,915.50