Finding the Fourth Proportional to 1,355.24, 1,870.24 and 757.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.24 : 1,870.24 = 757.76 : x
2. Step 2: Convert to fraction form
   1,355.24/1,870.24 = 757.76/x
3. Step 3: Cross multiply
   1,355.24x = 1,870.24 × 757.76
4. Step 4: Simplify right side
   1,355.24x = 1,417,179.92
5. Step 5: Solve for x
   x = 1,417,179.92/1,355.24
6. Step 6: Final answer
   x = 1,045.70