Finding the Fourth Proportional to 1,355.07, 1,869.83 and 757.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.07 : 1,869.83 = 757.55 : x
2. Step 2: Convert to fraction form
   1,355.07/1,869.83 = 757.55/x
3. Step 3: Cross multiply
   1,355.07x = 1,869.83 × 757.55
4. Step 4: Simplify right side
   1,355.07x = 1,416,476.58
5. Step 5: Solve for x
   x = 1,416,476.58/1,355.07
6. Step 6: Final answer
   x = 1,045.32