Finding the Fourth Proportional to 1,388.04, 1,915.49 and 758.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.04 : 1,915.49 = 758.58 : x
2. Step 2: Convert to fraction form
   1,388.04/1,915.49 = 758.58/x
3. Step 3: Cross multiply
   1,388.04x = 1,915.49 × 758.58
4. Step 4: Simplify right side
   1,388.04x = 1,453,052.40
5. Step 5: Solve for x
   x = 1,453,052.40/1,388.04
6. Step 6: Final answer
   x = 1,046.84