Finding the Fourth Proportional to 1,355.11, 1,870.02 and 757.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.11 : 1,870.02 = 757.57 : x
2. Step 2: Convert to fraction form
   1,355.11/1,870.02 = 757.57/x
3. Step 3: Cross multiply
   1,355.11x = 1,870.02 × 757.57
4. Step 4: Simplify right side
   1,355.11x = 1,416,671.05
5. Step 5: Solve for x
   x = 1,416,671.05/1,355.11
6. Step 6: Final answer
   x = 1,045.43